Issues with GR Future Soldier

So I have multiple displays hooked up to my PC, and GRFS seems to want to pick my secondary monitor. And I've tried everything to fix this, but the only solution I've found is simply disable my second one. Any solutions to this? 

Also, when I've tried to join multiplayers games, the game simply closes to desktop for no apparently reason? 

What kind of GPU do you have and what's the VRAM on it?

I have the HIS Iceq 7870. I believe 2GB. This is the only game that does this btw. I have no issues with any other game.

 

Have you downloaded the latest patches? If it's not that then there's something about the game interfering with Windows or whatever OS your using. Try reinstalling it too.