Jan, For your info also have a look @ this article (http://avgclick.me/CoveredPCs).
AVG Guru
on how many computers can I install my AVG
Hello Jan. I see that you've Internet security product. You can install it on only one system. If you would like to install the program on multiple devices by a single purchase, I suggest you to purchase the new product called PROTECTION. It has all the same features as that of your current Internet security but the only difference is that it can be installed on n number of devices and also protects your Android devices too unlike your Internet security. Thank you.
Jan, For your info also have a look @ this article (http://avgclick.me/CoveredPCs).
AVG Guru