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It could be an indication that there may be a problem with your hard drive, or it may just be a corrupted system file. Did you notice any clicking noises from your hard drive?
Try a disk check to see if anything shows up. Disk Check
If not, you could try a repair install using this tutorial: Repair Install
It keeps all your personal files and applications intact, but should fix any problem files that Windows finds.
You can also check for corrupt system files by running this command from a command window with elevated privileges: sfc /scannow
Don't read too much into lack of replies. The forum has members from different parts of the world with different time zones, and you may have posted at a time when many of us were in the land of nod, inspecting our eyelids.