My computer installed that this morning when it was still working.. and now it won't work. Is that even a real service pack?? Whenever i try to turn it on, it's always a blank screen after the Windows XP loading screen pops up. I tried to reset the BIOS values but then now it won't go to the Windows loading screen. It stops and displays "DISC BOOT ERROR. INSERT SYSTEM DISC AND PRESS ENTER". Can anyone help me please? :sigh: