Windows Error 1921 - 0x80070781 - The name of the file cannot be resolved by the system

[sgilberte]

I just installed Windows 10 Pro Fall Creators Update but I can not enable WSL. I have tried it in 3 different ways:

• Turn Windows Features on or off
  
  
• PowerShell as Administrator
  Windows PowerShell
  Copyright (C) Microsoft Corporation. Todos los derechos reservados.
  PS C:\WINDOWS\system32> Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux
  Enable-WindowsOptionalFeature : El sistema no puede resolver el nombre del archivo.
  En línea: 1 Carácter: 1
  Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows- ...

    + CategoryInfo          : NotSpecified: (:) [Enable-WindowsOptionalFeature], COMException
    + FullyQualifiedErrorId : Microsoft.Dism.Commands.EnableWindowsOptionalFeatureCommand
  

• Cmd as Administrator
  C:\WINDOWS\system32>Dism /online /Enable-Feature /FeatureName:Microsoft-Windows-Subsystem-Linux /All
  Herramienta Administración y mantenimiento de imágenes de implementación
  Versión: 10.0.16299.15
  Versión de imagen: 10.0.16299.19
  Habilitando características
  [==========================100.0%==========================]
  Error: 1921
  El sistema no puede resolver el nombre del archivo.
  El archivo de registro de DISM se encuentra en C:\WINDOWS\Logs\DISM\dism.log

Thanks in advance

[stefanfinke]

I have exactly the same issue on Windows 10 Education (Pro Fall Creators Update installed)

Turn WSL Windows Features on:

Powershell:
PS C:\WINDOWS\system32> Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux
Enable-WindowsOptionalFeature : Der Dateiname konnte durch das System nicht zugeordnet werden.
In Zeile:1 Zeichen:1

• Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows- ...

•   + CategoryInfo          : NotSpecified: (:) [Enable-WindowsOptionalFeature], COMException
    + FullyQualifiedErrorId : Microsoft.Dism.Commands.EnableWindowsOptionalFeatureCommand
  

[0xbadfca11]

Try DISM.exe /Online /Cleanup-image /Restorehealth, them retry.

[jdarbymitchell]

Same problem. Just updated to Fall Creator's update after doing an lxrun /uninstall and turning off WSL and Developer Mode. Now I can't turn WSL on at all. I get 0x80070781 error code regardless of which of the three methods described above I use. I tried 0xbadfca11's suggestion without success.

Not sure if it matters, but when I did the update, I had storage settings set to install apps to a different drive than the boot drive. I found instructions that indicate this could cause trouble:
https://msdn.microsoft.com/en-us/commandline/wsl/install_guide

[jdarbymitchell]

Rolled back to update 1703, re-enabled Developer Mode but was not able to re-enable Windows Subsystem for Linux (Beta). Same behavior and I get the same error message. So, whatever is causing the problem survived the rollback and has now broken WSL regardless of update version. Used Windows 10 Update Assistant to roll forward to update 1709 again. Still no joy. Ironically, WSL was the whole reason I installed the update.

[Bak-Jin-Hyeong]

I'm having the same problem.

[sgilberte]

Finally, I had to reinstall Windows from scratch. That way I made it work for me. Thank you all.

[ghost]

that cant be the only way can it ?

[x893]

More info in %WINDIR%\Logs\CBS\CBS.log
First error
2017-10-25 16:50:56, Error CSI 0000001d (F) c0000280 [Error,Facility=(system),Code=640 (0x0280)] #209055# from Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysCreateFile(flags = (AllowFileNotFound|AllowSharingViolation|0x00000100), handle = {provider=NULL, handle=0, name= ("null")}, da = (SYNCHRONIZE|FILE_READ_ATTRIBUTES), oa = @0xea208fb318->OBJECT_ATTRIBUTES {s:48; rd:NULL; on:[34]'??\C:\WINDOWS\System32\lxss\en-US'; a:(OBJ_CASE_INSENSITIVE)}, iosb = @0xea208fb378, as = (null), fa = 0, sa = (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE), cd = FILE_OPEN, co = (FILE_DIRECTORY_FILE|FILE_SYNCHRONOUS_IO_NONALERT|0x00004000), eab = NULL, eal = 0, disp = Invalid)
[gle=0xd0000280]
2017-10-25 16:50:56, Error CSI 0000001e@2017/10/25:13:50:56.181 (F) onecore\base\wcp\sil\merged\ntu\ntsystem.cpp(2938): Error c0000280 [Error,Facility=(system),Code=640 (0x0280)] originated in function Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysCreateFile expression: (null)
[gle=0x80004005]

and first error 0x80070781

2017-10-25 16:50:56, Error CSI 00000028 (F) HRESULT_FROM_WIN32(1921) #194218# from Windows::COM::CPendingTransaction::IStorePendingTransaction_Analyze(...)[gle=0x80070781]
2017-10-25 16:50:56, Error CSI 00000029 (F) HRESULT_FROM_WIN32(1921) #192659# from Windows::ServicingAPI::CCSITransaction::ICSITransaction_Commit(Flags = 47, pSink = NULL, disp = 0, coldpatching = false)[gle=0x80070781]
2017-10-25 16:50:56, Error CSI 0000002a (F) HRESULT_FROM_WIN32(1921) #192658# 1927146 us from Windows::ServicingAPI::CCSITransaction_ICSITransaction::Commit(flags = 0x0000002f, pSink = NULL, disp = 0)
[gle=0x80070781]

[Bak-Jin-Hyeong]

I deleted the "C:\WINDOWS\System32\lxss" folder and tried again.
It works.
Thanks to @x893 !

[mangeg]

Had the same problem with adding optional feature .NET Framework 3.5 after the upgrade to 1709. I had it enabled before the upgrade, but the upgrade for some reason removed it.

Error in CBS.log
2017-10-26 07:45:21, Error CSI 00000796 (F) c0000280 [Error,Facility=(system),Code=640 (0x0280)] #565888# from Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysCreateFile(flags = (AllowFileNotFound|AllowSharingViolation|0x00000100), handle = {provider=NULL, handle=0, name= ("null")}, da = (SYNCHRONIZE|FILE_READ_ATTRIBUTES), oa = @0x9ea3fac38->OBJECT_ATTRIBUTES {s:48; rd:NULL; on:[77]'??\C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5'; a:(OBJ_CASE_INSENSITIVE)}, iosb = @0x9ea3fac98, as = (null), fa = 0, sa = (FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE), cd = FILE_OPEN, co = (FILE_DIRECTORY_FILE|FILE_SYNCHRONOUS_IO_NONALERT|0x00004000), eab = NULL, eal = 0, disp = Invalid)

C:\Program Files (x86)\MSBuild\Microsoft\Windows Workflow Foundation\v3.5 was a symlink to a non-existing folder. Removed that and after that the installation worked with no problem.

[choleraehyq]

Deleting the "C:\WINDOWS\System32\lxss" folder also works for me.

[stefanfinke]

That did the trick

[ghost]

i fixed my problem, even though i had deleted the "lxss" folder there was still a symbolic link to a folder that used to be there.

i used "Junction Link Magic" , This showed me the symbolic link location

i simply ran as Administrator "rmdir {Location from "Junction Link Magic"}"

hope this helps some you you people out.

Nick

[ghost]

sorry link to program

link

[x893]

Hope helpfull for lxss developer to fix installer.

[jbalat]

Thanks guys used your tips to install Windows media player so I can run it once to get Microsoft Hyperlapse pro working on my Windows 10.

use junction link magic to identify symbolic links
find cmd and open as admin
rmdir the symbolic links that dont work
run optionalfeatures.exe from the cmd window
click media player and install

[rafaelsiza]

The same thing. i cannot fix my problem, check this out:

[iorelk]

i have the same proble with the update and using user in microsoft store i cant install or download from the store

[Frenzyz]

Deleting the "C:\WINDOWS\System32\lxss" folder also works for me.

I can't seem to find the lxss folder in system32 and it is still not working

[zugerto]

I had a broken symlink. Look for errors in C:\Windows\Logs\CBS\CBS.log when enabling the feature for hints.

[microsoft-github-policy-service]

This issue has been automatically closed since it has not had any activity for the past year. If you're still experiencing this issue please re-file this as a new issue or feature request.

Thank you!