I did look over your FAQ page and scanned the forum, but was unable to find the ,minimum/recommended system requirements for installation & running of avast!4.
You did not look carefuly enough :-)

Such things are indeed on our web: when you select the Products/Avast! Home and look into the lextbox, you will see the requested ‘System requirements’ item linked to: http://www.avast.com/i_idt_1323.html :wink: :wink:

Hope this helps
Pavel