In my opinion, I really don't recommend it. I would say you would be better off just using a 30-day trial of the new Emsisoft Anti-Malware/Internet Security or by using Avast FREE. Yeah, the free edition.
AVG may have many features but at the end of the day it's job is meant to prevent infections, and all types of viruses from rootkits to keyloggers etc. It is terrible. The detection rate may be okay, but let me just tell you that when my friend used it on his PC a few months ago, it detected malicious behaviour and viruses etc. The only problem is, it failed to remove them. Every time he got a popup somewhat saying something like, "AVG failed to remove this file" or "AVG couldn't remove this threat", "Error" and so on. It couldn't remove not one out of the 11 or more viruses he had on his computer. My friend installed the free version of Avast! and ran a full system scan. It detected 9 and removed them successfully and then Hitman Pro managed to discover the rest and remove them.
So no, I don't recommend AVG. It failed to remove the viruses. There's not much point in detecting them and leaving them there to kill the system.