Sorry moderators you will probably move this but I was hoping the most people would see it here.
I would advise not installing service pack 3 for XP. After I did while I had no initial problem even after a restart. Today when I started up my system I completely lost my video drivers the display only gave me a 4 bit and a 800 x 600 display no other options were available. It also corrupted my McAfee Anti Virus so it would not work. luckily I had made a restore point before I had installed SP3 and was able to go back to that point. I still had to reinstall my video drivers and reinstall McAfee on my system.
Good old M$ at it again >:(