I have been having all sorts of browser failures, etc,
tried running in safe mode & had more of the same.

I went to Control Panel/Administrative Tools/Event Viewer/
& found some very interesting stuff:

Faulting application explorer.exe, version 6.0.2800.1106, faulting module xvid.dll, version 0.0.0.0, fault address 0x00047d0f.

I uninstalled the xvid codec & so far things seem a little more stable.

I will do further investigating in the morning.

First John