Used Alarm Parts

I wonder what antivirus is better or preferred? I've used a few and my fav is pro zone alarm.?
I also like to karaskapy. I do not know if I make this right. I tried McAfee and Norton. They're fine, but Norton seam to the blog by the system or slow the PC or the RAM or whatever. And the time it took to boot. I tried CA Antivirus yi dont care to be a quasar I picked up many of the Trojans all the time Ca never caught any of them. I tried the firewall and was Ca very difficult to get out of my system. I think I had to download something and then go into safe mode to delete it i cannot remember for sure, but it was a pain.So if someone wants to Ca firewall think twice and do not. havent tried avg or any other free yet. I have a guy in my city that meets and determines PC and so on. He said that work avg do very well or any of the free ones. He says that because he goes to people's houses to fix computers and someone with average has a virus and was destroyed semos of your PC or the head of the PC.
Kaspersky. You have to trust me in this case.
Asianwolf 30 AMP Alarm Relay for Car Alarm Installation