Alistair, Have a look @ this recently released AVG article (http://avgclick.me/InstallIsRunning).
AVG Guru
Unable to get avg to update. Keep getting message that "Update has detected running installation" but nothing is installing. I even rebooted the computer and it still won't update. I have aslo run Task Manager and it isn't showing anything either.
Alistair, Have a look @ this recently released AVG article (http://avgclick.me/InstallIsRunning).
AVG Guru