Two separate issues but it's possible that they're related:
There's not many experts at fixing Windows Updates or SFC corruptions.
I am not one of them.
But the few experts that there are a sorely overworked - so getting a reply will be difficult.
I'll continue to attempt to help here, but please bear with me.
First, please try the Windows Update troubleshooter/fixes listed here:
Windows Update Troubleshooter: https://support.microsoft.com/en-us/gp/windows-update-issues/en-us
Windows Update Troubleshooter KB article: https://support.microsoft.com/en-us/kb/2714434
Reset Windows Update Components KB article: https://support.microsoft.com/en-us/kb/971058
Then, if that doesn't fix the Windows Update problem, please do the following 2 things. (copied from here: http://www.sysnative.com/forums/windows-update/4736-windows-update-forum-posting-instructions.html ):
This free tool of neimiro's creation (see above link) is a very good starting point for the diagnosis and repair of all Windows Update and System File Checker corruptions. We therefore need you to run this tool prior to collecting logfiles.
- First download and run a copy of the tool from http://www.sysnative.com/niemiro/apps/SFCFix.exe.
- Work through any on-screen prompts and then await completion (runtime is approximately 15 minutes).
- Once it has finished, if there are any unrepaired corruptions (the tool will notify you if it has succeeded in repairing all corruptions if they're simple in which case we're no longer needed) or unresolved problems with your computer, you need to post us the complete logfile which opens on exit. Simply copy (Ctrl-A, Ctrl-C) and paste (Ctrl-V) the entire logfile into your new thread (also know as a 'topic'). How to create a new thread is shown later on in this post.
FYI - I suspect that the corruptions are related to a problem with SFC.EXE that hasn't been fixed by Microsoft yet.
Here's a link to a post that explains it: http://www.bleepingcomputer.com/forums/t/579014/sfc-files-corrupt/?p=3730896
I also noted a bunch of Bonjour errors and nVidia video driver errors.
Please download a fresh copy of each.
Then uninstall them, reboot, and install the fresh copies.
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