Just wanting some layered protection and spyware coverage... So I'm looking to add onto my TDS registration with either Pest Patrol or Tauscan. I only use TDS on demand for full drive scanning once and a while.. Can I safely install either Pest Patrol or Tauscan on the same computer (winXP) without affecting TDS? I don't think I'll use any of the above for background processing. Thx in advance!