Found this solution on the yahoo answers forum from member intc_escapee and it worked for me:
1) go to »www.grisoft.com/ww.download-update 2) make a directory on your desktop called AVG 3) download AVI: 270.6.4 4) download IAVI: / 1616 5) move the dowloaded files to the directory you made called AVG 6) launch AVG 7) select tools -> update from directory 8) select the directory called AVG where you put the downloads