ok goto task manager: csrss.exe? end process , this might fix it but i don't know how to get rid of, maybe search where it is and get remove tool.
also try this, put your xp disk in and at the bottom this will say ''Press F6 if you have to install a third-party SCSI or RAID driver.'' when you see it press F7.
OMG OMG I JUST REMEMBER ABOUT A YEAR AGO I DID THE SAME THING OMG I JUST CANT BELIVE I FORGOT, I WAS PISSED OF, then i found this:
i remember now omg, i did it, its kinda hard if your new at it BUT YOU MUST SPELL IT CORRECT AND FOLLOW CORRECT, i did a few mistakes following this as its hard to missspell with all the dots n slashes, anyway do it man, i reakon it will work
hold on, did you see a box appear and say system will shut down in 60seconds?