can you recommend a website where i can download a free software where i can get to scan my computer pc, i think i need a scam on my hard drive because my computer is acting weird. im getting viruses and lots of popups and its performing very slow that its driving me crazy. i think i have some sort of spyware of trojan horse on my window xp machine but im not sure. i downloaded a free trial version of norton anti-spy ware and anti-virus internet protection but its not working. i think this only removes adware.