Well this is very odd and i'm not quick sure how to explain it...First off i have a p3 1ghz 256mbs of ram. What happens is when the heat cutts on in the house my computer will restart it's self this only happens when the heat or air turns on. It wont always do this but it will either do that or when the heat/air does cutt on the HD wil start acting very weird like spinning up over and over kinda like when u first cut on the comp cept when it does it then it only does it one time cept here it does it several times...So if it anyone has ever incounter this situation and knows what to do about this please let me know!!