I used to have AVG but went to Microsoft security essentials. It would be interesting to know if security essentials would have caught the root kit hook. I have had those in the past on an older system. I do weekly checks in safe mode and never found anything that security essentials didn't find running normally.
"A pessimist sees a problem with an opportunity. an optimist sees an opportunity with a problem."
Civilization is invaded by barbarians every generation. (author unknown)