Thanks, Neemobeer,
Once upon a time, I would have had a Ghost image and I would take the drive down and use Active Killdisk to get rid of everything on the drive and start over. But, I don't have that anymore. I haven't had trouble for 5 years, and I let it expire.
I might just copy all the data and do that. But I don't want to lose my Office 2010. I bought a 3 computer license, but I've only installed it on this computer. Yet, I don't have the disks, and I don't want to lose it. Pretty much everything else I have I have the disks for, and I can reinstall.
Since this is random, I don't think it is CPU overheat, is it?
Thanks, I'll try to test hardware.
John