Just about anything.
What is in the Event Viewer logs?
Start, Run and type:
eventvwr.msc
Look under Application and System.
Also, look for a Dr. Watson log.
If all logs are totally clear, I would suspect it's a
hardware problem like overheating RAM, bad RAM,
overheating CPU, overheating hard drive, bad power supply.
Run CHKDSK /R on your hard drive and defrag it before you
go spending money.
