I have noticed in the last few months AVG sending a pop up wanting someone to upgrade the Free Edition from 2011 to 2012 or to install a Summer Update. If you are not careful, you will miss during the install that installing a trial version of AVG’s Internet Suite is selected by default. Only later when the trial runs out will you receive a message saying you need to pay to continue to receive AVG updates because your trial period has ended.
When I first received this I was annoyed and was going to uninstall AVG and install something else like Microsoft Security Essentials. However, I found when you go to remove AVG you have the option to downgrade the trial version to AVG Free Edition. Doing this puts you back on the Free Edition and lets you receive updates again.