The first thing to try is the classic uninstall procedure. Simply go to Control Panel > Uninstall a Program and locate the software in the list. Double click it and choose Uninstall.
There is also the possibility to use the tool provided by the developers of AVG. Reach the following page to download the remover tool: http://www.avg.com/us-en/utilities
The tool will use its own way of removing the product without affecting your PC's functionality.
