already done that that were the first thing i checked when i installed ma new processor after realizing windows went loading. Everything that ave checked is all ok, registering everything properly voltage is ok to cpu, ram detected, hdd detected, fan speed goes throught the roof tho, i am just assuming like but i dont think ma mobo is compatible with duel core but i cant see that being the case. The bios is been made especially for this system from acer/American Megatrends would that ave anything to do with it?? they aint any updates for the bios aswell ave already checked