Uninstall McAfee, get CCleaner and remove registry remnants with that. Nod32 is a good anti-virus (very low-profile and good, but isn't free). If you want free, go with AVG or Avast. Comodo free firewall is pretty good...its what I have. I'd also reccomend Spyware Blaster, Ad-Aware 2007, and Spybot Search & Destroy. I do nightly scans with Spybot and Nod32...Comodo is always on... scans once in a while with Ad-Aware...and Spyware Blaster is a continuous protection as well, I believe.