Word to the wise...avoid AVG.
A client took it apon himself to buy and install AVG for their home computer. Within a week it was infected with two trojans. After running AVG with the system restore turned off and finding the trojans I rebooted only to find the trojans again. I followed this process 3 times before I uninstalled AVG and loaded Avast Home Edition. Avast found and cleaned the trojans on the first pass. A virus hasn't gotten a toehold into that system since (only several warnings). It took 2 weeks but the AVG folks refunded my clients money.
AVG is good for spyware and (I may be dated) rootkit detection, but its sorely lacking as anti-virus software.
If you're going to hint a threat at least pick something that works