Hello,i'd got a problem with my pc. Every time i try to install windows i'd got a BSOD. In windows xp i got atapi.sys error even when i boot from windows xp live cd, i'd got a BSOD too. In windows 7 i got MACHINE_CHECK_EXCEPTION BSOD, but some times diffrent. When tried to installed ubuntu, i got CPU failed report. Using win 98 live cd it's running well. Then i try to install win xp from another pc, when back to my pc...i'd got BSOD too. But i can enter to windows using safe mode. FYI, every time i unplug and plug again any hardware from mobo, there is "CMOS checksum error" report shown when booting. It is normal? Any one can help my problem?