I’ve tried Trend Micro, McAfee, Norton, Registry Mechanic, CA, and several freeware programs like Zone Alarm, AVG, Advanced System Care, Spyware Blaster, Easy Cleaner, and most recently COMODO Internet Security. It seems to me like they all worked somewhat well for a while. Seems like either the program gets too cumbersome or the PC ends up slowing way down. Even had 3 PC’s die after getting slow. Got a laptop now that’s really slowed down. Do you just need to switch security providers frequently? Who do you trust??