Account Security

[Aelzrith]

I've used Avast Home Free for years and have nothing but good results. You must re-register the program every year, but it's not necessary to use real contact information. Very light on the system. Auto-updates and a silent mode are available that prevents the popup notifications and alert sounds. It has detected every potential virus and I use it to scan client's drives for virii. The newest version has a firefox plugin that displays website ranking/safety.

Avast combined with Spybot Search & Destroy's feature: immunize, are a great combo.

And as Darkwulf mentioned, Firefox with Adblock plus is a great way to preemptively stop misleading or infectious advertisements from appearing on teh interwebs.