Did this before myself. AVG is (from what I remember) in itself a spyware/adware/virus. To get rid of it use regedit. First make sure, it is not currently running on your system. Open Task Manager. Ctrl-Alt-Delete. Go to running processes. If currently running use "Stop process". Close Task Manager. Click start button. Go to Run. Type regedit. When it opens, find Grisoft. Right click and delete. reboot. Good Luck