He had Norton Antivirus on it. It didn't do anything.
Norton Antivirus is kinda crappy, because people get it for free and don't realize it stops updating unless they pay for it. So the antivirus was probably years out of date.
Get AVG Free and run that on there. http://free.grisoft.com
i liken Norton requiring the $50/year as blackmail. Customers pay it b/c they're scared not to. They don't know what will happen if they DON'T pay it so they keep paying.