Hello everybody, I had the same problem, the solution is:
Reboot and press F5 or F8, then you go to "Advanced startup options" (by press F8 in my case) and then go to "System Recovery Options", after you sign in as administrator you go to "System Image Recovery" and skip the popup windows and go to find the image to recovery, here you can see the units you have: C:, D:..., you go to the system unit, in my case: C: and go to folder \Windows\WinSxS and then rename the pending.xml archive as pending2.xml and then restart.
You also can go to "Command Prompt" in "System Recovery Options" and write the following:
cd C:\Windows\WinSxS
ren pending.xml pending2.xml
exit
And then restart, Note: C or D or E depending of letter of System Unit, Note: Also can write rm pending.xml to deletethe archive.
Finally you uninstall the respective update package which causes problems.
I expected this can be a helpful for you.