Illegal File Names in Windows 10

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  • Опубліковано 15 чер 2024
  • Let's hit 3000 likes! 💜 Ever tried creating a file or folder with a backslash or question mark? Windows will not let you. Well, what if we ignore Windows and do it anyway? Be prepared: Windows will hate us. Big thanks to mattx for getting me into this topic!
    0:00 - Intro
    0:23 - #1: The WSL Deception
    4:19 - #2: Drive Links
    6:37 - #3: Unicode Tricks
    9:43 - #4: Corrupting Folders
    12:38 - #5: Caption Contest Winner
    13:00 - Outro
    ----------
    Join the channel's discord server "The Flying Tech"!
    bit.ly/FlytechDiscord
    Follow me on Twitter:
    / flytechvideos
    ----------
    Lots of awesome music used here! (Really, I'm starting to run out of it.)
    Three Chain Links - All We Ever See Of Stars: • Three Chain Links - Al...
    Three Chain Links - Hot Nights in Los Angeles: • Three Chain Links - Ho...
    Three Chain Links - It Can’t Be Bargained With: • Three Chain Links - It...
    Three Chain Links - Missing You: • Three Chain Links - Mi...
    Three Chain Links Soundcloud: / beardmont
    Thank you for offering us this awesome music for free, and thanks to RoyaltyFreePlanet for making it known! :)
    #lookinside #disallowednames #flytech
  • Наука та технологія

КОМЕНТАРІ • 902

  • @KoczulMoczul
    @KoczulMoczul 3 роки тому +786

    Legend has it that Automatic Repair actually repaired something. Oh wait... It turns out that's true

    • @powewq1748
      @powewq1748 3 роки тому +23

      Almost funny... close...

    • @phagerxfostos3913
      @phagerxfostos3913 3 роки тому +117

      @@powewq1748 you stole my profile pic

    • @BurritoLad
      @BurritoLad 3 роки тому +21

      Phager Xfostos Google gave you two the same letter and color.

    • @kirillsvc
      @kirillsvc 3 роки тому +15

      In fact, it repaired filesystem error on C:\

    • @ForeverMan
      @ForeverMan 3 роки тому

      You don't know how to be funny

  • @____.__._.._
    @____.__._.._ 3 роки тому +742

    Windows: I like when users are calm and doesn't mess with me
    Fly and Enderman: Let us introduce ourselves...

  • @maximized3041
    @maximized3041 3 роки тому +663

    NTFS: I fear no men
    But this thing
    It scares me
    corrupt

    • @leap123_
      @leap123_ 3 роки тому +3

      69th like
      nice

    • @XeZrunner
      @XeZrunner 3 роки тому +18

      @YICHEN XIONG The one time Automatic Repair actually did something

    • @somerandomguyintheinternet
      @somerandomguyintheinternet 3 роки тому

      Fellow tf2 player?

    • @tee.enderxity
      @tee.enderxity 3 роки тому

      The Automatic Repair Finally does his jobs!

    • @Anya-rb7do
      @Anya-rb7do 3 роки тому

      ¡¿√√∆¶xfjhvxfb L,negvij

  • @swordcrafted
    @swordcrafted 3 роки тому +307

    Windows: you cant use disallowed filenames in ntfs with ME!
    FlyTech: i know but he can
    *points to flytech*

  • @__builtin_popcount
    @__builtin_popcount 3 роки тому +273

    9:23 The reason typing a ? directly works is because it's the wildcard symbol for one character, just like * is for multiple. Therefore, o? matches any folder with a two-letter name starting with o. Once you have two folders that fit the pattern, PowerShell doesn't know which one you mean and tells you.
    The same will happen if you have two folders named e.g. oa and ob, and try running cd o?. It will work if you have just one, but not with two or more.

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +77

      Oh, TIL. Thanks!

    • @VegasProYAYAY
      @VegasProYAYAY 2 роки тому +2

      @@FlyTechVideos Hi

    • @saft2529
      @saft2529 2 роки тому +6

      @@FlyTechVideos are you responding those days in 2022? i just need a respond of you to check if you are active or no

    • @FlyTechVideos
      @FlyTechVideos  2 роки тому +11

      @@saft2529 yes i am not dead, i am planning new videos

    • @saft2529
      @saft2529 2 роки тому +2

      @@FlyTechVideos oh ok

  • @avi8aviate
    @avi8aviate 3 роки тому +110

    "Are you noticing a pattern here? All of them are starting with F0. Could this mean something? Let's find out."
    So the F-Zero franchise *isn't* dead!?

    • @garrettv.g.1758
      @garrettv.g.1758 3 роки тому +3

      F-Zero's really fun; for a while it was better than Mario Kart until Double Dash came out.

    • @avi8aviate
      @avi8aviate 3 роки тому +3

      @@garrettv.g.1758 I only know that F-Zero's a racing game and that Nintendo basically killed it by not releasing any more games. Kid Icarus is in a similar predicament.

    • @kayleighmoore6951
      @kayleighmoore6951 3 роки тому

      F-Zero franchise: yep

    • @mrpiese1295
      @mrpiese1295 3 роки тому

      F-zero, best SNES game :D

    • @avi8aviate
      @avi8aviate 3 роки тому

      @@mrpiese1295 Personally, I prefer Kirby Super Star.

  • @Steets
    @Steets 3 роки тому +163

    Fly: "I'm going to break Windows"
    Windows Automatic Recovery: " _No._ "

    • @infectious_yt
      @infectious_yt 3 роки тому +4

      I wanna like but not destroy those 69 likes

    • @tee.enderxity
      @tee.enderxity 3 роки тому +5

      Enderman:"Lets mess with Windows 10"
      Windows Automatic Recovery:"Don't "CTAC" With me..."

    • @tee.enderxity
      @tee.enderxity 3 роки тому +1

      @ClassyUtra windows ctac xD

    • @tee.enderxity
      @tee.enderxity 3 роки тому +1

      @ClassyUtra lmao

    • @nil8659
      @nil8659 3 роки тому +2

      @@tee.enderxity ctac is a horrible misspell of "cat". also, windows ctac is kinda funny for me

  • @R.B.
    @R.B. 3 роки тому +51

    Windows 3.1 had interesting filename support. Before LFN, I used to use BASIC to make folders with spaces in the names. It didn't like that. I also used it to add an unprintable character to the filename. You could access the folder using the command prompt, but Windows File Manager didn't know how to open it. With few tech savvy people at the time, this was a decently safe way to hide files in plain sight that only I knew how to open.

  • @Austeja608
    @Austeja608 3 роки тому +413

    NTFS is case sensitive but Windows is not
    Im intrested how this could break

    • @adamfra64
      @adamfra64 3 роки тому +5

      yes

    • @T_nology
      @T_nology 3 роки тому +6

      Good video idea!

    • @honzapat
      @honzapat 3 роки тому +41

      Actually, you can edit some regedit, and windows will also be, but so many programs dont account for that, like msvc compiler, so you wont probably break windows, but a lot of other lazy programs

    • @bamberghh1691
      @bamberghh1691 3 роки тому

      @@honzapat isn't registry case insensitive?

    • @malwaretestingfan
      @malwaretestingfan 3 роки тому

      @@bamberghh1691 Key names are case insensitive, don't know about values.

  • @TheWTFDubstep
    @TheWTFDubstep 3 роки тому +189

    Windows: I can't handle it
    Linux: sudo handle it

  • @sounak5853
    @sounak5853 3 роки тому +80

    The BGM change while "Did WSL lie to us" reminds me of Ace Attorney.

    • @DimiDimit
      @DimiDimit 3 роки тому +4

      Yeah, reminds me of a track from Apollo Justice, I think.

  • @uwu_peter
    @uwu_peter 3 роки тому +67

    12:08
    Automatic repair usually only repairs Disk corruptions, light-middle registry corruptions and BCD/MBR corruptions

    • @uwu_peter
      @uwu_peter 3 роки тому +23

      Also, since Automatic Repair is part of Windows RE which is on a separate partition, it still can run, except if you corrupt the Windows RE Partition, because then you are totally screwed.

    • @jadesanford2857
      @jadesanford2857 3 роки тому +7

      if youve never accidentally deleted your windows re partition can you even call yourself good at computers

    • @justsomerandompersononthei2595
      @justsomerandompersononthei2595 3 роки тому +5

      Jade Sanford I've purposefully deleted it before. I currently keep it because I have learned that it is actually important.

    • @jadesanford2857
      @jadesanford2857 3 роки тому +3

      one time while attempting to grow the /home partition for my (then) kubuntu install i somehow managed to format my entire hard drive instead which was pretty epic and cool imo

    • @uwu_peter
      @uwu_peter 3 роки тому +3

      @@jadesanford2857 Yeah, In my times I acidently deleted my EFI partition and corrupted the Windows RE partition by replacing files inside the winre.wim file on the partition.

  • @VDani16
    @VDani16 3 роки тому +72

    Wow! I am impressed! Windows self repairing actually works in some situations! It isn't that useless. The first time I saw Windows repair working.

    • @uwu_peter
      @uwu_peter 3 роки тому +13

      Automatic repair only repairs disk, registry and bcd/mbr corruptions

    • @gabrielandy9272
      @gabrielandy9272 3 роки тому +2

      it can fix many issues, acctualy problem is very common for you to have a issue it can't do anything.

    • @bloonsfamily2066
      @bloonsfamily2066 3 роки тому +6

      automatic repair also fixes issues like:missing kernel, boot loader and so on

    • @VDani16
      @VDani16 3 роки тому

      @@bloonsfamily2066 that's nice

    • @bloonsfamily2066
      @bloonsfamily2066 3 роки тому +1

      @@VDani16 and also a corrupted c: drive

  • @JayCeeCreates
    @JayCeeCreates 3 роки тому +58

    Me: creates "corrupt" in the user folder
    Windows: *now entering Incognito mode*

    • @Austinkeith2010
      @Austinkeith2010 Рік тому +1

      me: creates "corrupt" in the C drive and the recovery mode drive
      Windows: enjoy a dead pc

  • @Preinstallable
    @Preinstallable 3 роки тому +41

    The rare occasion when Automatic Repair fixes something.

  • @drawdebono77
    @drawdebono77 3 роки тому +53

    Actually, there's one other case you didnt include: creating a folder with three dots at the end of the name. This is actually possible within windows. I actually faced this problem by creating it out of lousyness. I had an mp4 file of the movie "The englishman who went up to a hill but came down a mountain" Now you could see why I was lousy to name the folder, and also, because I thought I could easily reach the 256 characters limitation for a folder path if the download of this file would have folders named the same inside the folder I created in my desktop, which just for the sake of counting, would be initially "C:\Users\edwar\Desktop" 22 characters without quotes. So I named my desktop folder "The Englishman..." exactly like that, with three dots at the end. Well, finally the movie was there, and when the time came, I wanted to move this folder with all its content to my multimedia files HDD. Well, I couldnt do it. My next guess was I simply reached that characters limit, so I tried to rename it. No luck, windows would not allow it. I was able to copy the content (not cutting or deleteing content was allowed either) and paste it in another folder in the desired HDD, which I just named "The Englishman 1995" . After I copied the content I decided to delete the original desktop located folder and its content, but windows didnt allow it. Tried again renaming the folder, again, undoable. Ok, shift + delete: no. Drag to recycle bin, no. Ok, time for extreme measures. CMD: rmdir: no; del: C:\Users\edwar\Desktop\The Englishman blah blah blah", no; rename folder, no. Actually, here it was where I realized what I did: I created a folder that was giving the DOS instruction to go to the previous folder of the string, so whenever I wrote "The englishman who went up..." after any given DOS command, I was ñtaken back to the desktop, no matter if I was using cmd prompt normally, with admin rights, powershell, or even directly from the windows 10 CD repair utility. At this point, I was only really to recover my space from C drive, because its a tiny little 128GB SSD, which dont like a 4GB mp4file in my desktop. Also I was worried this could became a problem afterwards. But if I was unable to delete this folder even from command prompt, what was I to do? Well, actually it was something a little weird I discovered by googling for an answer. Someone suggested to create a compressed RAR file with the program WINRAR, and selecting the option "Delete files after archiving", when creating it. Well I gave it a try... and it worked! Finally deleting the RAR file was no problem as it didnt had an ivalid name, so that was easy. This was the only way this folder was deleted from my desktop. Never thought about using a Linux distro, because I thought the three dots would also been an instruction in there, so I did not even give it a chance. Hope you mae it till here. Only something about a situation that wasnt covered by this video.

    • @oniinu
      @oniinu 2 роки тому +3

      I've never seen someone confuse "lazy" with "lousy".

    • @Temerold_se
      @Temerold_se 2 роки тому +1

      lol

    • @SOTP.
      @SOTP. Рік тому +1

      It would have worked if u used unc patchs in the rmdir (or rd) command. Just like that: rd "\\?\C:\Users\Loldontknow\Desktop\The englishman..." /s /q

    • @TDXC------
      @TDXC------ 8 місяців тому

      One time i created a ... folder through new folder option.
      And it did nothing.
      Also it was on my main PC.
      I could just delete it.
      I didnt have to do like
      rmdir \q \\?\C:\Users\????? ??????\Desktop\... in cmd
      Explorer just behaved as if it was just a normal file name.
      The filename WAS NOT DOTS AND WASNT F046 F046 F046.
      It just worked for no reason.
      I was quite scared because I had watched FlyTechs video but...
      Was it false??
      I was on windows and you probably know that,

    • @telamont12mc
      @telamont12mc 7 місяців тому

      I aint readin allat

  • @HSHamster
    @HSHamster 3 роки тому +14

    Windows: It works
    FlyTech: Something doesn't feel right

  • @Creeper5760EsUnCaraBeluga
    @Creeper5760EsUnCaraBeluga 3 роки тому +66

    again youtube notified me 16 minutes after the premiere end.

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +36

      damn ... youtube, fix your stuff please

    • @Dash2J
      @Dash2J 3 роки тому +1

      @@FlyTechVideos yes

    • @kali6377
      @kali6377 3 роки тому +1

      I will explode the chat (Read my name)

    • @kali6377
      @kali6377 3 роки тому +1

      @Legosploiter NoooOOoOOO

    • @energized5785
      @energized5785 3 роки тому

      Same! :(

  • @awwastor
    @awwastor 3 роки тому +15

    Just for clarification:
    Unix systems (including Linux and BSD) technically speaking CAN use names with “/“ and NUL. The limitation isn’t on the side of the system(unlike on windows) but the file system (ext[2-4] doesn’t allow those characters.). So if you use a nonstandard file system allowing for “/“ and NUL in names, Linux can handle it while windows won’t be able to handle filenames of any FS if they include the forbidden characters.

    • @bamberghh1691
      @bamberghh1691 Рік тому

      While i understand how '/' would work, how would NUL character in filenames work with any of the syscalls? Don't all of them, like open(2) expect a null terminated string for a filename?

  • @Konym
    @Konym 3 роки тому +9

    Honestly this channel is awesome. Learned more about Windows internals through this channel than through 4+ years of using Windows as a poweruser by myself.

  • @chillshobe8147
    @chillshobe8147 3 роки тому +10

    Documentation: Undefined behaviour
    FlyTech: It'd be rude if I didn't...

  • @elSchwaznevvo
    @elSchwaznevvo 3 роки тому +56

    11:59 the whole NTFS FILE SYSTEM was the reason of BSoD

    • @alluseri
      @alluseri 3 роки тому +5

      It's time to get whooooshed.
      This is an error code which shows that there is an issue with the file system.

    • @nsg650
      @nsg650 3 роки тому +1

      i mean kernels do it when you screw around with the file system even linux does it but rarely

    • @graceperez9672
      @graceperez9672 3 роки тому

      Alluseri r/wooooooooosh

    • @DimiDimit
      @DimiDimit 3 роки тому +2

      @@nsg650 Thankfully Linux's errors are usually more meaningful than “EXT4 FILE SYSTEM”.

    • @blenderroll2162
      @blenderroll2162 3 роки тому

      i mean this all is because of the ntfs file system

  • @tiamat818
    @tiamat818 3 роки тому +35

    This is incredible, but now I'm wondering why windows is reacting like this, especially the last part

    • @flp322
      @flp322 3 роки тому +4

      I had hoped the video would go into that!

    • @Sniperx102
      @Sniperx102 3 роки тому +1

      If you are programmer might you will understand why windows behaves like that..
      I think FindFirst and FindNext APIs will fail in the presence of those characters..

    • @nil8659
      @nil8659 3 роки тому

      @@Sniperx102 yeah,I understand APIs as a small programmer.

    • @PabTSM-OfficialChannel
      @PabTSM-OfficialChannel 3 роки тому +1

      @@Sniperx102 nope, those characters are preserved for the os for the search bar, location bar, values and more.

    • @Sniperx102
      @Sniperx102 3 роки тому +1

      @@PabTSM-OfficialChannel You did not give any news to what ive said, BTW i am a programmer so i know what i am talking about.

  • @Austeja608
    @Austeja608 3 роки тому +17

    Windows doesnt like them but NTFS doesnt care

  • @mathias_mp
    @mathias_mp 3 роки тому +11

    Your videos are very, very interesting. It looks like I'm learning something new every 30 seconds (or less). Keep it up, good job!

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +6

      Thank you :3 I'm also learning a lot during making these videos. I didn't know about any of this 1 week ago

    • @taylorscates8015
      @taylorscates8015 3 роки тому +1

      @@FlyTechVideos
      Hi

  • @barkeeper7887
    @barkeeper7887 3 роки тому +19

    This is so goddamn interesting
    i love this channel
    Your videos are so amazing man, youre my favourite youtuber

  • @eh9490
    @eh9490 3 роки тому +7

    Nice Video about disallowed NTFS names

  • @icedude_907
    @icedude_907 3 роки тому +73

    The more videos of yours I watch, the more I realise that windows internals are really, really, messy and barely hold together.
    Also: why is it that Linux drivers can do these things to NTFS partitions and keep it readable, whereas the very operating system NTFS was designed to work well with can't? It's rediculous!

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +28

      They try to stop people like me from corrupting their OS

    • @therobloxianstar4689
      @therobloxianstar4689 2 роки тому +3

      @@FlyTechVideos That's so funny! I don't know if you think it's not funny lol

    • @Whatwhy012
      @Whatwhy012 Рік тому

      @@therobloxianstar4689 One thing I accidentally learned from FlyTech is that you should watch the full video before actually trying out something. I made a folder with a space as its name, and now I have an un-deletable folder on my desktop.

  • @justeunviewer906
    @justeunviewer906 3 роки тому +44

    what if you put a «con» folder into the «» folders ? can Windows delete them ? :p

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +20

      It behaves just like

    • @renakunisaki
      @renakunisaki 3 роки тому +5

      @@FlyTechVideos what about just creating C:\con?

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +9

      It's a weird unusable folder but you can create and remove it from within windows

    • @U20E0
      @U20E0 3 роки тому

      @@FlyTechVideos try putting tha < and > in a different order, so >

    • @cones914
      @cones914 3 роки тому +1

      @@U20E0 windows would have a mental breakdown from all the abuse.

  • @mekb1
    @mekb1 3 роки тому +3

    4:40 who else remembers going in a loop with mac's "volumes" folder

  • @jc008titan
    @jc008titan 3 роки тому +102

    wtf windows repair actually repairs?!

    • @uwu_peter
      @uwu_peter 3 роки тому +8

      yes, Automatic repair only repairs disk, registry and bcd/mbr corruptions

    • @akurasubject9617
      @akurasubject9617 3 роки тому +3

      Automatic repair is like 4 parallel universes ahead.

    • @xyzzy-dv6te
      @xyzzy-dv6te 3 роки тому +1

      @@uwu_peter does that mean it will erase GRUB if I start it when dual-booting with Linux?

    • @uwu_peter
      @uwu_peter 3 роки тому +3

      @@xyzzy-dv6te I think Automatic repair will just crash and stop working when it sees that you are using grub, since it doesn´t know what GRUB is.

    • @xyzzy-dv6te
      @xyzzy-dv6te 3 роки тому

      @@uwu_peter I'll have to try that soon

  • @joshbrookens5226
    @joshbrookens5226 3 роки тому +7

    Now I'm going to boot a friend's PC from a live cd and put folder: on their desktop.

  • @ZettaBlitz
    @ZettaBlitz 3 роки тому +6

    help, i can't stop watching your videos.

  • @TheZelen
    @TheZelen 3 роки тому +65

    Fun fact: "\" folder behaves the similar way as "..."

  • @kruemmelbande5078
    @kruemmelbande5078 3 роки тому +38

    I used linux to name a folder "con" wich, for Windows is very illegal, cuz its for a Driver, and... I cant even copy it off of the usb... I cant open it, i canr copy it, its weird

    • @ad2k17
      @ad2k17 3 роки тому

      you dont even havr to use linux for that

    • @kruemmelbande5078
      @kruemmelbande5078 3 роки тому +3

      @@ad2k17 yeah, but i have an old laptop that i installed ubuntu on, so, i dont need to mess around with any comand prompt.

    • @justsomerandompersononthei2595
      @justsomerandompersononthei2595 3 роки тому +1

      Nomnom Groz The windowing server even runs on bash.

    • @franchufranchu119
      @franchufranchu119 3 роки тому

      @@nomnomgroz8843 nah

    • @ad2k17
      @ad2k17 3 роки тому +3

      in other words, bash ≠ cmd

  • @DavidWonn
    @DavidWonn 3 роки тому +14

    9:45 Regarding the unusual behavior of < and > in filenames, here’s another oddity to consider. A viewer of my last video commented that < and > can actually be used as wildcard substitutions for filenames, provided they are escaped inside double quotes to prevent them from being interpreted in the usual way as redirectors. I personally verified it to work even on older versions of NT and have no idea why cmd.exe would interpret < or > as ? or * though.
    Could these phenomena be linked in some way?

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +9

      I have no idea whatsoever. What I know is that these characters are forbidden by NTFS and not necessarily Windows. Thus, all explanations with shells (like wildcards or redirects) seem unsatisfactory...well, except if these limitations were imposed because of Windows in the first place. I don't know.

  • @claudiu7909
    @claudiu7909 3 роки тому +6

    I once made a few print screens on Ubuntu and copyied them on my windows desktop
    But I failed to realize that the images had the date with / in their name. Windows refused to open them. Or to rename them. It was interesting.
    Edit: this was some time ago so some details are a bit vague. As fly mentioned / are not permitted in filenames on linux, I don't remember what the separator for date was used, but now that I remember things a little better, I think the problem was the character I used to separate the time (hh:mm:ss), but I don't remember what it was.
    Anyway, I couldn't use those images until I renamed them in ubuntu, but at first I was confused why windows was basically ignoring their existence. (they also had no thumbnail, not sure I spelled that right)

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +5

      / is illegal even on Linux, so that's weird

    • @claudiu7909
      @claudiu7909 3 роки тому

      @@FlyTechVideos Sorry, my memory failed me. It was some time ago, I don't remember exactly what the illegal character was, but I remember it was something to do with the date or time

  • @unknownaccount4783
    @unknownaccount4783 3 роки тому +6

    Interesting fact:
    When deleting any HTML file, Windows search for a folder named with the same name as HTML, but ending in _files
    so, deleting "x.html" file will delete "x_files" folder also
    And, deleting "x_files" folder will delete "x.html" file

    • @gamermapper
      @gamermapper 3 роки тому

      That's true?

    • @groszak1
      @groszak1 2 роки тому

      I thought there was some mysterious link behind them

  • @zfennica
    @zfennica 3 роки тому

    It is interesting to see folders named with the disallowed characters, thank you for showing this, your videos are interesting!

  • @tflsh
    @tflsh 3 роки тому +4

    Thank you for the tutorial to make Windows look like Linux with the drive folders! :D

  • @ncot_tech
    @ncot_tech 3 роки тому +3

    There's some interesting things going on with WSL. If you download something that Windows wants to protect you from - like a PDF or something else that needs "unblocking", and drag it into your \\wsl$ network drive, WSL creates a file called :Zone.Identifier. That file is completely invisible to Windows.

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому

      Yup. Check out my "Alternative File streams" video, I explained it in detail there

  • @ElijahCiali
    @ElijahCiali 3 роки тому +7

    Now, what happens when you put the C:\ folders into a compressed folder?

    • @Aura_Mancer
      @Aura_Mancer 3 роки тому +1

      I think it will try to make a compressed folder of C:
      Which will make 7z, or WinRAR, or whatever program you're using to ran out of memory, space in temp, or crash do to recursion.

  • @biniesh7097
    @biniesh7097 3 роки тому

    u put a lot of work into the videos!!!!!! i love this channel. በጣም በጣም በጣም በጣም እናመሰግናለን

  • @huailiulin
    @huailiulin 3 роки тому

    I can’t believe I saw this after this was published! Thanks Fly Tech!

  • @BSabbath
    @BSabbath 3 роки тому +2

    FlyTech : *Uploads Video*
    Me :
    *Well it's time to learn something new!!*

  • @munastronaut8147
    @munastronaut8147 3 роки тому +3

    the old name:
    Disallowed NTFS File Names vs. Windows

  • @burdbath09
    @burdbath09 2 роки тому

    y'know, ive always had a weird obsession with computers. when i was little, they always intrigued me. they always made me ask questions. i still love computers, and flytech, you were one of the first computer youtubers i ever watched. thank you for answering the questions ive had since i was a child.

  • @remty516
    @remty516 3 роки тому +1

    Watching your videos give me tons of ideas of things to do on school computers.
    Zipbomb on a usb stick,
    Illegal names,
    . folder,
    "secret folders" (toolbars GUIDs)
    Hiding stuff in folders... etc

  • @Tearnalte
    @Tearnalte 3 роки тому +3

    3:10 most people: nice music
    Me: tHaT's SuMmOnNiNg SaLt MuSiC

  • @9rye
    @9rye 3 роки тому +12

    Dang it, woke up 30 mins AFTER the upload :(

  • @jello3064
    @jello3064 3 роки тому +1

    Your videos make my day ;)

  • @goldenlongbow
    @goldenlongbow 3 роки тому

    Messing with windows is always funny. I love your videos

  • @VarunGupta3009
    @VarunGupta3009 3 роки тому +4

    I try many of these tricks on my live Windows installation, and hopefully, I'll never mess up XD.

    • @thecommentato4
      @thecommentato4 3 роки тому +3

      Don’t use those on a real pc. Use them in windows sandbox or vmware

  • @lucianothewindowsfan
    @lucianothewindowsfan 3 роки тому +5

    When I have first seen the PartedMagic logo, I thought it said R-Rated Magic.

  • @prodnayah
    @prodnayah 3 роки тому

    This was actually really interesting and educational

  • @gallium-gonzollium
    @gallium-gonzollium 2 роки тому +1

    There was a bug on my old USB stick where Onedrive would add a Documents and a Shared Documents folder twice, both in the same directory listing. I checked Properties in case any characters slipped through, but no! Duplicated folders with the same name and I could open both by all means in Explorer. Weird.

  • @romanhredil3799
    @romanhredil3799 3 роки тому +5

    What if someone sends you an archive which contains some files with illegal characters in filenames and you try to open it?

    • @lychy645
      @lychy645 2 роки тому

      it wont open

    • @bottering_one
      @bottering_one 2 роки тому

      windows will refuse to open the archive's
      or maybe it wont open and windows will struggle itself¿?

  • @morsikpl
    @morsikpl 3 роки тому +3

    Writing "o?" works, because '?' is special character for "single character", like '*' is for "multiple characters". It worked becasue you had exactly one directory called "o". If you create two, the '?' will be consufed and try to load 2 directories into command line (at least that's how it would work in bash) - what actually happened later in the video ;)

  • @The-pf4zy
    @The-pf4zy 3 роки тому

    Very interesting video. I love it! ❤❤❤

  • @Rishi-ql8jj
    @Rishi-ql8jj 3 роки тому +2

    I barely subscribe any channel because their content isn't worth of that but your channel provides informative content
    Thanks and keep up with vids :)

  • @CoradiaClass175
    @CoradiaClass175 3 роки тому +3

    Out of curiosity, what happens if you run Winload.exe when windows is running, or what happen if you manage to run it in other OS / inside another VM?

  • @reynoldcracker02
    @reynoldcracker02 3 роки тому +5

    Using C: as file names might actually be used in hacks. Imagine a program only let you create and open file in your restricted path but the name cause windows to instead search in the Root directory 🧐

    • @nikkiofthevalley
      @nikkiofthevalley 2 роки тому +1

      Soo basically a sandbox escape? Would be _really_ easy to fix though, just disallow any path with "C:" in it.

  • @retropcs88
    @retropcs88 3 роки тому +1

    I remember when installing GTA Vice city the shortcut would be named Grand Theft Auto: Vice City and Windows went completely batshit while trying to delete it

  • @Lampe2020
    @Lampe2020 11 місяців тому +1

    In Linux only / is forbidden in folder names as it's the path separator, all Unicode characters are allowed, except /.
    I don't know exactly why Window$ blocks so many characters, but the colon is for accessing "Alternate Data Streams" for files on NTFS, which are for example used to tell Windoe$ a file is from the internet.

  • @mihiguy
    @mihiguy 3 роки тому +4

    At the beginning when you started to mess with NTFS from Linux, I asked myself which of your modifications would actually survive a chkdsk. Seems that you resolved this question at the end - none of them... (Adding also corrupted filenames on the recovery partition next to WinRE.Wim would probably have prevented chkdsk from "fixing" this issue...)
    Also, I am not sure why you are surprised that folders in WSL can be accessed by more than one name. Every file/folder within drvfs that contains at least one letter can be accessed by two names, and if it contains e.g. five letters, it can be accessed by 32 names...

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому

      I don't quite get your last point, what do you mean "accessed by multiple names"? If a folder is called "folder" then the only way to access it is to actually access "folder", or are you talking about something else?

    • @mihiguy
      @mihiguy 3 роки тому

      @@FlyTechVideos When accessing a file in DrvFS from WSL, it is accessed as if the filesystem was case insensitive. So a file called "folder" can also be accessed as "foLdeR" etc. This difference between U+0041 (A) and U+0061 (a) may seem "smaller" than the difference between U+F022 and U+0022 (as we as humans are used to not distinguising between upper and lower case letters) , but from the point of WSL it is exactly the same.

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому

      Okay, but I was never wondering about case sensitivity. Being case insensitive surely is a thing that has to be implemented extra because for a computer, that's 2 random different bytes. I don't think there is any special handling for 22 and F022, especially because trying to access the folder with 22 didn't work at all fron WSL...

  • @mierlenkintanar1430
    @mierlenkintanar1430 3 роки тому +3

    What happens if you place

  • @gamermapper
    @gamermapper 3 роки тому

    Private use characters can be used by fonts as anything you want, it just won't be assigned by Unicode

  • @sonambasak6590
    @sonambasak6590 3 роки тому

    Amazing!

  • @isabelle5547
    @isabelle5547 3 роки тому +3

    What would happen if you were to put the corrupted folders into a zip file, and then unzip it in windows?

    • @malwaretestingfan
      @malwaretestingfan 3 роки тому +1

      I think it would not unzip, with a hex error maybe.

    • @Austeja608
      @Austeja608 3 роки тому +2

      You create a black hole

  • @PhonicUK
    @PhonicUK 3 роки тому +8

    You should have tried folder names like "NUL", "LPT" or "CON"

    • @uwu_peter
      @uwu_peter 3 роки тому +2

      I think he already did in another video

    • @molybd3num823
      @molybd3num823 3 роки тому +3

      @@uwu_peter That was Enderman i guess

    • @anic1716
      @anic1716 3 роки тому +1

      That can be possible with CMD:
      md .\con\

    • @justsomerandompersononthei2595
      @justsomerandompersononthei2595 3 роки тому

      Anic17 But don't try it on your host, do it on a VM.

    • @anic1716
      @anic1716 3 роки тому

      @@justsomerandompersononthei2595 no problem, I have tried it and no G
      BSOD nor errors

  • @Nik-dz1yc
    @Nik-dz1yc 3 роки тому +1

    as someone who uses Command line for executing and doing alot of complex stuff, characters > and < are used for reading and writting to files and they are interrupts. The fact that windows is able to handle them without completely destroying itself is impressive

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому +1

      Well not really, as you can see. Linux, on the other hand, can do it without issues.

  • @MonochromeWench
    @MonochromeWench 3 роки тому +1

    Automatic recovery actually fixed the problem. First time ever!

  • @RecycleBin0
    @RecycleBin0 3 роки тому +5

    what if we hide a test virus in the 'folder' folder? will AV software be able to detect and remove it

  • @seven7000_
    @seven7000_ 3 роки тому +43

    idk why i am here but ok

    • @kali6377
      @kali6377 3 роки тому

      X2 xd

    • @Crazylom
      @Crazylom 3 роки тому +2

      You should be at heaven, bro.

    • @seven7000_
      @seven7000_ 3 роки тому

      @turtleboy23 No im not

    • @seven7000_
      @seven7000_ 3 роки тому +1

      @Kenn Honson X i choose other

    • @CopyMain
      @CopyMain 3 роки тому +1

      I'm here for learning the deep from windows

  • @cmyk8964
    @cmyk8964 2 роки тому

    If anyone’s wondering, the Unicode points U+F000~F07F are in the Private Use Area.

  • @markusTegelane
    @markusTegelane 2 роки тому

    The illegal filenames actually caused problems for me when I was trying to copy save files from a PlayStation 1 memory card, using uLaunchELF on a PlayStation 2, to a flash drive, so that I could use these saves with an emulator. PS1 save files actually have filenames (not to be confused with save file labels you see on the memory card browser), but you never actually see them, they are only visible to the game. Well, some clever programmers figured out they can get a few extra bytes of save space, without just using more blocks, by embedding some data into the filename. This means that some game saves use filenames that are perfectly fine on a playstation, but can cause problems if accessed from a Windows computer. The solution would be to rename the file with a PlayStation 2 first, before copying to a flash drive, and then put the raw save file into a memory card file using software such as memcardrex and then within the software itself, rename it to what it was before so the game actually loads the save file after loading that memory card file onto the emulator.

  • @abloogywoogywoo
    @abloogywoogywoo 3 роки тому +3

    A colon " : " is an illegal filename.
    But the ratio symbol, Unicode U+2236 " ∶ " is not. Have fun.

    • @justcrimson.7584
      @justcrimson.7584 3 роки тому +1

      Confirmed

    • @groszak1
      @groszak1 2 роки тому +1

      The ratio actually replaces the colon in the Windows 10 clock on the the taskbar

  • @darkex45
    @darkex45 3 роки тому +4

    Idea: what if you use cheat engine to mess with system processes?

  • @monkeyjammersvr
    @monkeyjammersvr 3 роки тому

    Thanks for telling me this! I’m new to Windows and I’m getting a pc on March 3rd.

  • @p15209
    @p15209 Рік тому

    WSL is a highly customized version to run as integrated as possible in the deep roots of the OS, so it's actually part VM and part (integrated with windows). So, it could be just following windows rules.

  • @normal_human-dh3kz
    @normal_human-dh3kz 11 місяців тому

    If you make a folder for game save back ups in steam and use the folder naming feature there you can put slashes in the names

  • @Donnyf3841
    @Donnyf3841 3 роки тому

    I'm liking this background music

  • @Mihacappy
    @Mihacappy 3 роки тому

    Some time ago i got adware, but i hardly removed it. how? It was located in %mishe%/%appdata%/Local/Temp and was infecting my google chrome, i deleted the annoying contents of the Temp folder and it was fixed...

  • @CarletoGamesCGYT674
    @CarletoGamesCGYT674 3 роки тому +1

    On my Windows 10 if I create those folders on Terminal, they appear with a middle dot, instead of the characters that I chose.

  • @I.____.....__...__
    @I.____.....__...__ 11 місяців тому

    3:00 An old trick to deal with filesystem objects with illegal characters in their names was to use wildcards, for example to "fix" a file called "foo*bar.txt" you could run "ren f* a" (or something similar). It may or may not work in different circumstances and different versions of Windows, but it's a quick and easy option to try before resorting to something more complex.

  • @nighttone2983
    @nighttone2983 3 роки тому +1

    Wow this video is fantastic

  • @c_zx7103
    @c_zx7103 3 роки тому +1

    Folder: and Folder*: why does everyone hate me
    PartedMagic: I don’t hate you that much

  • @shishioko
    @shishioko 3 роки тому

    You can create / or \ files in the drives root directoryby using HxD and edit the drives file allocation table and modify a existing files name

  • @aaronrennyvargheseOriginal
    @aaronrennyvargheseOriginal 3 роки тому +1

    Finally, Automatic repair actually works! Good Microsoft! Something which you have succeeded.

  • @Certifiedinsurance
    @Certifiedinsurance Рік тому

    All of illegal naming restrictions may suspect to be some what related in Windows Registry functions as file, which is also CLSID in Recycle BIN as {clsid}. < > is also registry Archives which could almost be create as files or text.reg.

  • @hibutima3
    @hibutima3 3 роки тому

    SO if you go to registry editor and choose where all of the file types are configured, you can see a very Long file type, so copy that and make a file with that file type name it is a Explorer file, which has a white Icon of the windows Explorer and the app is called "Windows Explorer"

  • @alli-windowsexpert
    @alli-windowsexpert 4 місяці тому

    If you will see these folders in the automatic repair if you click on the button on the desktop and automatic repair, it will actually change the directory to Drive called “Boot (X:)”

  • @VictorGamerLOL
    @VictorGamerLOL 3 роки тому +2

    Why does windows react in such a way when using this characters? Is it something to do with ascii or Unicode?

  • @EpicB
    @EpicB 3 роки тому

    Does this mean theoretically I could create an inaccessible folder on a Windows partition that I could only access on Linux? Would the contents of the folder be still accessible via Linux?

  • @ImXyper
    @ImXyper 3 роки тому +2

    *whatever they do, WSL refuses to acknowledge their existence*
    mood

  • @Soup7674
    @Soup7674 3 роки тому

    fly: be prepared! windows will hate us
    windows: i wasn't made for this goddamnit

  • @laggynacho
    @laggynacho 3 роки тому +1

    EPIC MUSIC BTW

  • @KakaunetOfficial
    @KakaunetOfficial Місяць тому +1

    How do you enter the auto recovery thing when he does a BSOD when you activate it?

  • @MrJay_0xJ
    @MrJay_0xJ 3 роки тому

    Thats realy nice video! 👍👍👍

    • @FlyTechVideos
      @FlyTechVideos  3 роки тому

      Thank you very much!

    • @MrJay_0xJ
      @MrJay_0xJ 3 роки тому

      @@FlyTechVideos well how we can find you?

  • @PhunkBustA
    @PhunkBustA 3 роки тому

    all your videos rack my brains out but i love it 😘