"Display driver stopped responding and has recovered" problem

When I try to run DirectX 11 games, they crash to desktop after few seconds and sometimes this message appears.

Screenshot: http://oi50.tinypic.com/17s51y.jpg

I tried updating the drivers, but I do not know what exactly to download and the update tool did not find anything either.

http://oi46.tinypic.com/14uia7r.jpg

http://oi47.tinypic.com/24nk3l4.jpg