Now my advice is the same, but for some additional and obvious reasons. No viruses. No spyware. No popups. Take back control of your computer and browsing experience. Get a Mac.
I have a Windows PC under my desk right now, dead. It was working fine until recently when it started rebooting itself every few hours, then fianlly would not boot at all. I never used it for more than website testing, but I suspect some sort of malware had gotten involved, even though I never even launched Outlook.
So, now the PC's CRT is hooked to my beloved 17' Powerbook, giving me much more room to play in Mac OS X. :D