When I boot my pc up it has suddenly started to ask what choice I require, Safe Mode, Boot sequence or Normal. I will not go straight into Windows. If I do choose Safe Mode the PC will shut down. I cannot go into Safe Mode. If I choose Normal, the PC will boot up normally. Hard drive compression has not been enabled. It was working fine until I installed a new sound card (Creative 5.1 Digital). I have downloaded the latest drivers. I've removed and reinstalled the card. Anyone got an idea what the problem could be?