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#1
One file left in Windows.old
After a successful install, I used Disk Cleanup to to remove windows.old - after a good while it finished, but the folder is still there, with one file still left:
C:\Windows.old\Windows\System32\DriverStore\FileRepository\point32.inf_x86_neutral_4c8bd195d4599eb3\ point32.sys
the file also exists in the new windows folder which is similar but exactly the same:
C:\Windows\System32\DriverStore\FileRepository\point32.inf_x86_4c8bd195d4599eb3\point32.sys
The two files are identical, same SHA-256 hash.
Initially the error was "Access Denied" so I took ownership of each folder and gave myself full control, after that, the error changed to "File is in use by another program" - Process Explorer could not find a handle to the file. Oddly, I can rename the file, which I did, to point32.xsysx but still cannot remove it. I know it's just one lousy 40KB file but it has me baffled.