Hi Guys Im having a bit of trouble with service pack 1 on vista. I have a dell xps m1730 with windows vista 32bit. Today i installed service pack 1 and then went to restart, it worked fine. But then i disconnecet my power supply and tryed to start it on just battery power. It got as far as the windows loading screen then screen went blank and nothing happend. I shut off comp and restarted it with power supply plugged in and it worked fine. I did this quite a few times to make sure the power suppy was the problem. After all of this I did a system resore back to before I installed sp1 and tryed to start it without power supply it worked fine. I then reinstalled sp1 and tryed again with no luck. Plz help im very confused.