Re: updates stopped (around december?)
"Disable automatic updates and stop the wuaserv service (the one running under svchost control and staying up at an entire core), then rescan for updates manually. Should show up with three to four important patches, ~300Mb."
An easier method to resolve most of these type of issues is to run the Windows Update Troubleshooter at https://support.microsoft.com/en-gb/help/10164/fix-windows-update-errors