Your problem appears to be an ancient update - KB976902 - which is 'stuck' in the queue and getting in the way of everything.
There were no significant errors in the SFC output.
Let's see if the CheckSUR tool helps at all...
Please download and save the CheckSUR tool from
System Update Readiness Tool fixes Windows Update errors
(you'll need to look in the details for Windows 7, downloading from the Microsoft Download Center)
Run it - The tool can take anywhere from 5 mins to a couple of hours to run (or 'Install') depending on how much it has to do, and may exit silently - it may appear to freeze for most of that time, but be patient.
The result is logged in the C:\Windows\Logs\CBS\CheckSUR.log file - and an archive …\checksur.persist.log file
Then zip the CheckSUR.log and upload it to your reply.
