I never have buy any software and i never will!
Like it was nicley explained in video about winrar that @Laz posted, companies dont live on people who use software in their home PC, they live from companies that buy their licence.
If piracy was such big problem for them, they will starve long time ago, they wuld not rool in cash!
There is no single person on Earth that has buy every software for its home, especially if you do lots of work on PC. They all at some point use some free program or pirated one.
Back on topic, AVG is crap, all you need to confirm that is to simply Google: AVG Wikipedia, then in Wikipedia look under:
Contoversy.