Just Cause 2 Directx problem

I know this game is kinda old but i got the urge to play it again. Anyways downloaded and installed JC2 from steam and each time i started it a error message popped up saying dxgi_error_not_found code 3. People said it caused by nvidia optimus with windows 8, JC2 works just fine on my old laptop. I tried both of these solutions here:

http://ift.tt/1GZZG7x

The first one works but it makes the game uses the intel 4600 instead of the Nvidia...

Just Cause 2 Directx problem

Just Cause 2 Directx problem