AVG, starting with ver 8.0 became another bloated program, which can't be even removed through Add\Remove, but needs a special tool to do it.
Yes, I'm one of hundreds of people, who had serious problem with installing, or running it properly, and I'm not a computer newbie. On a top of it, I've been working with security issues for number of years. If AVG is working fine on your computer, it doesn't mean a bit.
I've been using AVG for many years until the ver. 8.0 came out.
Use Google, and do some reading. Go to AVG forums, and you'll see.