So I have a gigabyte Ga Ma770t ud3p motherboard with f2c bios and can't seem to get the cpu to unlock correctly. I did it once the first time i installed Xp professional and it booted perfectly but I chose to lock it back up for some reason and now it wont boot as a dual core anymore. Any ideas? I did the Acc enabled and hybrid enabled with the bios and comes up as an athlon x2 4400be in the startup screen.