DON"T DO IT!!! don't run a scan if you get a pop up saying buy this to scan because you have a virus. that is one sure way to get infected!! I know because it has happened to me twice. My hubby used to work for the Gook Squad and he says not to click on pop up windows because of that. I would suggest down loading Mozilla firefox or google crome to run as your browswer for the internet. I have found less problems with them than Internet Explorer. I would manuely go into your computer and run a scan using your normal Virus protection.