Dell 5547 graphics problem

Hi, I just recently bought my new Dell 5547 i7 and I love it.

But there is an annoying problem that I really want to fix.

The problem is that when ever I play a games and want to change an in game resolution The windows is like

sort of soft restart like the windows is locked and when I unlock all my programs are closed and the next time I

try to open the games it soft reset again I need to change my computer resolution to lower in order to access

the games.

If my English is not clear please tell me

regards