Just my opinion...
My philosophy regarding anything (including computer software) is very simple:
Once burned, I don't touch it.
As the user above, I used AVG for number of years, until ver. 8.0 came up.
Had a lot of problems with it. What to do? Simple.
Forget it.
There are other AV programs out there. Why to bother?
Being on number of computer board, I've seen constant problems with 8.0 and 8.5.
Maybe, maybe 9.0 is some miracle, but personally, I don't care.