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