Comodo Reg cleaner
Windows Defender
BitDefender Free Edition v10
Antivir AntiVirus Free Edition
SuperAntiSpyware Free Edition
Malwarebytes AntiMalware
A-Squared Free
ZoneAlarm Firewall
What do you think? A little to excessive? I am paranoid about viruses and security and thus I have these ALL scan once a week (during the night). I to dust every 1-2 months (and blow out the heat sink as well).