My computer has been working fine until i installed windows XP service pack 3 and now it will load and stop at the windows screen. It won't even let me boot in safe mode. And i know you'll say uninstall service pack 3, but how do i get into Windows to do that?
start the pc, tap f8 every second or two while it starts, it should give you another option besides safe mode, something like "load with last known good configuration" try that.