I've been having some issues since October with installing several updates. I was finally able to resolve most of these by disabling secure boot. However, I still have 3 updates that will not go. Peculiarly, they are also all from 12/8 of last year. The error codes given are -

Update KB3083800 - Error code 800F0992
Update KB3112336 - *
Update KB3104002 - *

This is a generic error code which means NOTHING. So, I have no way of trying to figure this out. At least not that I can see. Does anyone have any ideas on where to start?