What happened here is you’ve visited AVG website to download free antivirus and ended up installing AVG IS with AVG Zen, which you’ve not expected or don’t want.
AVG hasn’t got their download pages right, even after 45 days later the release of their 2016 products.
If you don’t use AVG removal tool and you try to uninstall it by add/remove program sometime it doesn’t remove itself completely because some of security registry entries might get corrupted.
You can also face problems like: Computer freezing, unable to connect internet, computer speed become slow and start getting installation errors.
There are three options to solve this issue with AVG Free.