Xp antivirus 2008. I have my system infected frm xp antivirus 2008.....i downloaded the auper

Question

I have my system infected frm xp antivirus 2008.....i downloaded the auper anti-spyware & ran a complete scan....it detectd a lot of files & I hv deketd thm, howevr, the xp antivirus is still thr in the system.....I hav earlier tried deleting the registry keys as well bt cldnt find any related to xp antivirus.....Does any1 have a solution to ths??