I downloaded Adblock Plus and now I don't get the etrailer.com ad or whichever one is trying to get in above the Shop Forum page when using the Firefox browser but still get the ad if I open Shop Forum with IE.
So it blocks ads when using Firefox.
I've used AVG for the last couple of months and it has intercepted quite a few Trojan horse viruses. If I understand AVG correctly, it then scrambles the virus code and places it in a vault and gives you the option to unscramble the code back to the original if you feel it was legitimate code.

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1985 300D Turbo
"Evolution is God's way of giving upgrades" Francis Collins