My new printer installation instructions (Canon MP610) say to disable any antivirus programs before installing the driver. I found another post here that says to right click on the AVG icon at lower right of the screen and click on "shut down". That was in 2004; my current version says "Quit AVG Control Center" and the screen warning says I won't be able to control or monitor AVG activity, but it doesn't say that AVG is actually turned off. How do I turn it off? What happens if I don't bother?