Windows 10: Windows 10 dism unmount offline image failed with error 32

Hi thereI am trying to change some registry keys in an offline image BOOT.WIM as to ensure a recovery-media startup uses the right screen resolution.Therefore i use Windows Powershell admin and make some commandline entries.dism /mount-wim /wimfile:G:\SOURCES\BOOT.WIM /index:1 /mountDir:H:\Scherpbierje\export reg load hklm\temp "H:\Scherpbierje\export\Windows\System32\config\DEFAULT" reg add "HKLM\temp\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers" /t REG_SZ /v "X:\Programs\Paragon Software\program\hdm17.exe" /d "HIGHDPIAWARE" /f reg add "HKLM\temp\Control Panel\Deskto

:)

 

How to fix error unmountable boot volume

Hi James,

It is possible that you received the error UNMOUNTABLE_BOOT_VOLUME due to a damaged file system which failed to mount. This error also means that sub-system on machine failed to mount the boot volume. To efficiently assist you, we'd like
to gather more information:

• Have you made any recent changes prior to this issue?
• What is the exact error message you received?
• What troubleshooting steps have you done so far?

Meanwhile, we suggest that you you follow the steps shared by Michelle Her and
Billion Debbarma on this threads below to troubleshoot your concern:

• Windows 10 Unmountable Boot Volume Error Message And Automatic Repair
• Unmountable_boot_volume -Windows 10
  

Keep us posted if you need additional help.

 

UNMOUNTABLE BOOT VOLUME error

Hi Andre,

The challenge that you're experiencing when you got the error, UNMOUNTABLE_BOOT_VOLUME,
is due to a damaged file system that failed to mount. It also means that sub-system in the machine failed to mount the boot volume. To isolate the issue, kindly answer the following questions:

• When did you first encounter the issue?
  
• What are the troubleshooting steps have you done so far?
• How did you upgrade the device to Windows 10?

You can also follow the steps that was shared by Michelle Her and
Billion Debbarma on these threads to troubleshoot the issue:

• Windows 10 Unmountable Boot Volume Error Message And Automatic Repair
• Unmountable_boot_volume -Windows 10
  

Hope this helps and let us know if it works.

 

DISM - Add or Remove Drivers on an Offline Image


Ah I thought you might be doing the DISM/drivers one.

It is good info and I use parts of this frequently when I'm reinstalling on my old hardware and need to manually add drivers.

I would suggest DISM /Get-Drivers as an alternate to the Powershell step in 2.2 - the table format is quite useful I find.

One method of applying the drivers I tried which seems to work (not sure how valid it is) when clean-installing a machine as a one-off:

1. Export drivers as per Step 2
2. Use DISM /Get-Drivers to show which driver is which, and copy only the ones I know are problematic to a subfolder, and add this subfolder to a bootable Windows 10 Setup USB
3. Boot Windows 10 Setup from the USB
4. Open a command prompt with Shift F10, type command 'wpeutil shutdown' but don't press enter. Instead, Alt-Tab back to Setup
5. Follow the normal clean install process, delete partitions and let it install the relevant edition
6. When it says Restarting in a few seconds, quickly Alt-Tab to the command prompt and press enter, to stop it restarting but shut down instead
7. Boot again from the USB, go straight into Shift-F10, and use DISM /add-driver to add relevant drivers to the offline Windows drive as per Step 4
8. wpeutil shutdown again, and let it restart this time, so that Windows boots and finishes configuring itself with the new drivers available to it.

I found it easier than Mounting the image and also means I don't change the .WIM so I can use that on other hardware without fear of non-standard (and probably quite old) drivers getting in the way .

Although in some cases I could install and change it once Windows is up and running , one of 1709's default drivers causes a BSOD during installation itself, if I don't add the alternative manually using the above technique before it gets to that point.

But it's not a technique I've seen anywhere else so I'm probably bending the rules somewhere. *Wink