[Pirate]

I also have an acer display. Sometimes when I quit the game my desktop resolution drops to the res I use in the game, I've never figured out why - but it isn't much of a problem. I would disable the acer display manager from starting up with windows (if it does) or not starting it yourself - then see if the problem persists. It is possible your problem is related to mine in some way... though that is a guess.

Might be worth not opening the catalyst manager either - there isn't any need to have it running in the background.

Good Luck