I recently replaced a hard drive on a Pentium 4 Gateway computer. Everything was great up until SP2. Once the update was finished the machine stalled on reboot. It shows a screen much like SAFE mode. None of the options but safe mode would boot. Once in safe mode, I restored and everything was fine. I understand that there is a problem with BIOS in some processors. Can anyone tell me if they have had and or solved this issue. Thanks in advance for your help