This KB has been "stuck" on my system for a few months. It's a little unusual in that it supposedly requires a double-boot following successful installation, and in my case then a double-boot after each failure, in order to roll back the attempted changes.
The KB fails during the installation process (at 61%), always during the first reboot. There is no BSOD, and my system recovers gracefully after the following two reboots to undo the failed install...and then when I next shutdown the computer, we do it all over again. :-(
"sfc /scannow" reports:
There is a system repair pending which requires reboot to complete. Restart
Windows and run sfc again.
But when I reboot I go through the failed update process again, and afterwards "sfc /scannow" gives me the same error.
I do see that C:\Windows\winsxs\reboot.xml exists, but I cannot rename or remove it.
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Checking for updates . . .
No new update is available at this time.
Processing directive 1 of 1 (AutoAnalysis::)
Checking store directories . . .
Checking CBS.log . . .
Checking CheckSUR.log . . .
Attempting repair . . .
CBS & SFC total detected corruption count: 128
CBS & SFC total unimportant corruption count: 0
CBS & SFC total fixed corruption count: 0
SURT total detected corruption count: 0
SURT total unimportant corruption count: 0
SURT total fixed corruption count: 0
Press any key to continue to explanation of summary . . .
Successfully processed all directives.
ERROR: Failed to write final logfile. File may be in use.
Press any key to continue . . .
Attached is my C:\Windows\Logs\CBS\* logs.