AVG released 2011 products for their AntiVirus (for both paid and free versions) and AVG Internet Security 2011, AVG boasts these products doesn’t hinder PC’s performance and at the same time offers enhanced security to user’s PC, if you are using purchased AVG antivirus 9.0 or AVG internet Security 9.0 here is how to upgrade to respective AVG 2011 versions without uninstalling the programs.
Upgrade from AVG 9.0 to AVG 2011
1.First you need to download offline installers for AVG AntiVirus 2010 and AVG Internet Security 2010 which are provided at the bottom of the post.
2.Now run the setup file, during the install older version of license key will be automatically detected and shown as license key.
3.Follow the instructions on the screen, if everything goes fine after restart you will see AVG 2011 successfully installed in your Computer and activated.
Check the below video .
This method works for upgrading from AVG 9.0 free edition to AVG 2011 free edition as well.