I'd like to try one more thing before I get my mentors involved. Are you comfortable with creating folders and copying files around? If not let me know and I'll automate this more for you.
Please create the following two folders in bold. Please copy/paste the name so it's exact.
C:\Windows\System32\DriverStore\FileRepository\wiaek002.inf_amd64_57f9361b96ceea4b
C:\Windows\System32\DriverStore\FileRepository\prnekcl2.inf_amd64_59438dc7ce792b20
Copy wiaek002.inf from C:\Windows\Inf and paste into the 1st folder you created above.
Copy prnekcl2.inf from C:\Windows\Inf and paste into the 2nd folder you created above.
Now try installing the update. Please use the one that was manually downloaded.