As for AVG, you guys can argue until blue, but I simply know the facts, because I've been working with computers for over 20 years, and I was actually using AVG for many years until the version 8.0.
Since version 8.0 has been introduced, AVG has been having following problems (read me well, AVG still gives you good protection, and the problems listed below don't happen on every computer):
- installation problems
- removal problems
- updates problems
- false positive problems
- computer hogging problems
- messing up browsers downloading capabilities
- messing up general internet connection settings
All the above problems, I encountered myself working on number of affected computers.