Why don't you have an Anti-Virus?
For extensions I would recommend Bitdefender TrafficLight and WOT.
Do you have UAC active?
What about Firewall? Do you use the Windows Firewall?
You already have two of my three recommended AntiMalware scanners.
Robot_Z said:
I don't really visit any 'risky' websites. I have a cycle of websites per day and that's all I ever visit.
That is good to hear.