FWIW: I used to be a huge long time AVG then Avast fan - but it has gotten way tooo big of a resource hog for my liking.
Surfing around the geeky forums I read many people are also of the same opinion, AVAST and other FREE AV doing tooo much and slowing down the computer - also too many false positives! and are now running just the Microsoft Security Essentials - and it too is free.
I have been running it now for 1 year with no issues or violations.
Do your own research before you switch.
As I said in another thread (about Lukas Web Site is Down)
I could not get the FW or Viewer at all as I could not connect to the Web Site.
Even most Anonymous Proxy servers were having issues connecting to LukasHD.com
So I downloaded TOR Web Bundle - Connected fine downloaded 1st try - no an issue.
Maybe give that a go.
Basically TOR is a community based public anonymous proxy network. By starting the TOR network application and using the TOR browser (a copy of Firefox Portable Edition) it is a self contained application able to be run from the extracted folder anywhere on your Hard drive or taken with you on a USB sick, you can get to any page on the internet, eg I'm having routing issues from Australia to Taiwan directly, and using TOR it now bounces my connection around the internet a few times so my connection comes from not within Australia that is having a routing network issue - and it worked for me.