I upgraded to xp service pack 2 on compaq ws8000. it has dual zeon 2.4 processors and 1.5 gig of ram and 1Tb of space. After the upgrade, the bios loads and the black windows xp logo with the blue bar. when that is finished a black screen comes up and stays there for 7 to 10 mins. the the wallpaper comes up for 10 to 15mins and then the icons. the only thing i saw on the event view is MMC.exe is hanging. I ghosted an image to the drive with no luck, changed drives, removed some memory and changed video cards. Nothing worked. I am wondering if it could be the power supply. anyone have any ideas?