So my sister's PC (win XP pro) is completely fookered with malware etc., so much that it's barely functional. Browser pop-ups 4 and 5 at a time, forms won't send, google links get sent to 3rd party sites instead of what was clicked, even her file explorer gets invaded by "anti-spyware" ads when she tries to browse local files. It's the worst I've ever seen. Ad-aware seems to find over 100 malicious items and claims to have deleted them, but it makes no difference even after a reboot. Even when you kill the process manually, it re-spawns almost immediately. I tried running ad-aware in safe mode, and it made little difference. Now her OS is full out crashing and rebooting at random. Suggestions? Reinstall XP completely and wipe the whole thing clean? Will that completely fix all problems? Other options?