Ok, i went through this problem a while ago, my avg pro did not install correctly bacause the pc crashed during install... go figure, i needed to uninstall it and reinstall it... this was a pain
so i just wanted to say, never try to uninstall an antivirus... unless your in safe mode... or the program will be back after a restart, and with mine, the uninstaller dissapeared, i had to get a specialized removal tool for it...