Thanks rclarke250
I've been fighting an intermittent freezing for two months now. Sometimes once a day - sometimes once a week. So far, the record has been two weeks. I've been through the CPU (temps O.K.), memory swap, vid card, etc. Right now, I have swapped out my USB keyboard for a old fashioned PS2 style. So far,it's been 3 days!
I can't replace the mobo, I would have to start from scratch with a whole new system!
I've bookmarked this site (Repair), just in case!!!