If you're running AVG 7.5 (free) then you're probably already aware but you have to manually upgrade to version 8.x in order to continue to receive virus definitions after the end of this month.
Assuming this link works, here's the download to continue the *free* version
http://www.download.com/AVG-Anti-Virus-Free-Edition/3000-2239_4-10320142.html?part=dl-AVGAntiVir&subj=dl&tag=button
:)
Got it a couple of weeks ago thanks Jason.