I've found a solution to the AVG issue.
Probably will not help everyone but just in case..
My Logitech profiler blew up some time ago when Rfactor suggested it needed updating and I took the advice and had a terrible week unable to get my wheel to work. Finally got it uninstalled and my previous version back but I never got the actual profiles to work afterwards. (Calibration, wheel rotation and FFB settings are ok I just can't pull the actual profiler up and create key assignments.
).
So I looked for alternatives and settled on an application called "joytokey" which is a keyboard emulator where keyboard keys or combinations of key strokes can be mapped to joystick buttons and axis. (So it does exactly what the profiler does).
I discovered that I could stop the GTL screen minimising by clicking the left mouse button every lap or so.
So, a bit of thinking outside the box and my solution was to map a left mouse click to the throttle axis so every time I press the throttle it also mimics a left mouse click.
The throttle still functions in GTL as normal (And GPL so it also resolves the loss of sound issue).
I've run a few lengthy tests with AVG active and so far no minimising.
I guess a similar trick could also be used in the profiler mapping assignments as well.
TTFN
John.