I cant uninstall avast

I cant unistall avast, because I have a very small resolution (I cant change this) 800x600, and is imposible uninstall this program because the buttons from uninstall is hidden because my small resolution >:( >:(

http://oi58.tinypic.com/219nwuo.jpg

http://oi58.tinypic.com/219nwuo.jpg

Use the Avast clear tool http://files.avast.com/iavs9x/avastclear.exe run it normally and it’ll ask for permission to reboot to safe mode where it will complete.