Unknown DirectX Errior?

I've been attempting to join a game but every time the game starts loading in, it says "Unknown directx error" or something along those lines. Then I get a leaverbuster and have to wait twenty minutes. twenty minutes pass and I get into another game. the SAME ERROR happens and I'm forced to wait 20 minutes again. [zombie-brand-clap] Every game I join counts as another leaverbuster and I've now technically 'left' four games. I really want to play but I can't figure out the problem. I've tried uninstalling and everything. What should I do?