With XP antivirus 2012, you can use control-alt-delete to end task. Then run an rkill. Then run quick malwarebytes scan and remove everything, but don't reboot. Then run a full malwarebytes scan. You may find that the virus restarts even after an rkill after 3 or 4 minutes. Just close the program again and run an rkill and let the quick malwarebytes scan to keep the virus from restarting. Then run the full scan to completely get rid of the virus.