DISM Fails to Unmount WIM with "Access is Denied" (Error 0x80070005) in Windows 11 24H2

Question

Encountering an issue while trying to unmount a WIM file using DISM on Windows 11 24H2. The command fails with "Access is Denied" (Error 0x80070005). Below are the details of the command, environment, and error log:

Command used to unmount image:

DismUnmountImage();

Environment:

• Operating System: Windows 11 24H2
• DISM Version: Latest ADK installed
• WIM File: Created using copype

Error Log Excerpt:

[1628.1372] Received unmount request.
[1628.1372] Unmount complete.
[1628.6740] Wimserv exiting per terminate event.
[1628.6740] Wimserv stopped.
[488.9632] [0x80070005] FIOEnumerateReparsePoints:(627): Access is denied.
[488.9632] [0x80070005] CleanupExtractRemainingStubs:(534): Access is denied.
[488.9632] [0x80070005] WIMUnmountImageHandle:(1683): Access is denied.
[488.9632] [0x80070005] WIMUnmountImage:(2048): Access is denied.
2024-11-18 15:51:36, Error                 DISM   DISM WIM Provider: PID=488 TID=9632 onecore\base\ntsetup\opktools\dism\providers\wimprovider\dll\wimimage.cpp:93 - CWimImage::Unmount(hr:0x80070005)
2024-11-18 15:51:36, Error                 DISM   API: PID=488 TID=9632 onecore\base\ntsetup\opktools\dism\api\lib\imagingcommandobject.cpp:671 - CUnmountImageCommandObject::InternalExecute(hr:0x80070005)
2024-11-18 15:51:36, Error                 DISM   API: PID=488 TID=9632 InternalExecute failed - CBaseCommandObject::Execute(hr:0x80070005)
2024-11-18 15:51:36, Error                 DISM   API: PID=488 TID=4356 CUnmountImageCommandObject failed - DismUnmountImageInternal(hr:0x80070005)
2024-11-18 15:51:36, Info                  DISM   API: PID=488 TID=4356 GetReferenceCount hr: 0x0 - CSessionTable::RemoveSession

Ensured that:

1. The mount directory and the WIM file are not in use by any other process.
2. DISM is run with administrative privileges.
3. No antivirus software or third-party programs are interfering with the process.

Despite these checks, the issue persists.

Questions:

1. What could be causing the "Access is Denied" error during unmounting?
2. Are there any additional logs or diagnostics to check to pinpoint the issue?
3. Does this error indicate a permissions problem, or could it be related to the WIM file or system configuration?
4. Is it ok to use DISM API and DISM command line in the same process at a time?

Any insights or troubleshooting steps would be greatly appreciated. Thank you!

Answer 1

I'm hitting the exact same issue that Thirumurugan is describing.

In my scenario I have two virtual machines: Win11-23H2 and a Win11-24H2; both have ADK 10.1.22621.1 installed. I launch a command prompt with admin privileges and run the following:

"C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Deployment Tools\DandISetEnv.bat"
copype amd64 c:\temp\foobar
mkdir c:\temp\mount
dism /Mount-Image /ImageFile:"C:\temp\foobar\media\sources\boot.wim" /index:1 /MountDir:"c:\temp\mount"
dism /Unmount-Image /MountDir:"c:\temp\mount" /commit

Win11-23H2 works great, but Win11-24H2 fails with the same access denied error:

2024-11-19 08:32:43, Info                  DISM   DISM Imaging Provider: PID=12212 TID=10756 The provider VHDManager does not support CreateDismImage on c:\temp\mount - CGenericImagingManager::CreateDismImage
[11124.11852] Received unmount request.
[11124.11852] Unmount complete.
[11124.9212] Wimserv exiting per terminate event.
[11124.9212] Wimserv stopped.
[12212.10756] [0x80070005] FIOEnumerateReparsePoints:(627): Access is denied.
[12212.10756] [0x80070005] CleanupExtractRemainingStubs:(534): Access is denied.
[12212.10756] [0x80070005] WIMUnmountImageHandle:(1683): Access is denied.
[12212.10756] [0x80070005] WIMUnmountImage:(2048): Access is denied.
2024-11-19 08:32:59, Error                 DISM   DISM WIM Provider: PID=12212 TID=10756 onecore\base\ntsetup\opktools\dism\providers\wimprovider\dll\wimimage.cpp:93 - CWimImage::Unmount(hr:0x80070005)

I do not have a question to add - just adding more information to Thirumurugan's reported issue.