I had a Windows 7 PC that was running and we took a Disk2VHD copy.

stop: 0x0000007b (0x807BB48, 0xC0000034, 0x00000000, 0x00000000)

After0x0000007b BSOD boot problems we ran a repair that discovered:

Root cause found:

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Unspecified changes to system configuration might have caused the problem

Repair action: System files integrity check and repair
Result: Failed. Error code = 0x490
Time taken = 1151094ms

---

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I presume this means running an SFC /scannow

The system was telling me that it needed a reboot from previous repair attempts.

"There is a system repair pending which requires reboot to complete. Restart Windows and run SFC again."

However after a reboot I got the same message.

Running regedit from Windows RE I found there was a restart still required so I ran:

dism.exe /image:C:\ /cleanup-image /revertpendingactions and rebooted again.

Re-entering the Windows RE I ran SFC /scannow again - still the same error.

I checked for a pending.xml file in x:\windows\winsxs\ and it was there.

We renamed with ren x:\windows\winsxs\pending.xml oldpending.xml

Now we could run SFC /scannow but it appeared to be running on the WinRE (X: drive) rather than the installation we needed to fix.

We read that sfc /SCANNOW /OFFBOOTDIR=c:\ /OFFWINDIR=c:\Windows will specify the drives, but that we should make sure which drives are being used by the Windows install we wish to fix. We did this by running bcdedit which revealed:



So we ran sfc as above from the drives shown in BCDEdit:



It still hasn't got to 1% after five minutes, so presumably it is doing something...?

I don't know why but the process never displayed a percentage and completed with no integrity violations.