Frames per second problems

well i was playing combat arms on wednesday and it was working fine getting 80-100 fps on medium setting's then i try to enter a game and all of a sudden i try to enter a room and Combat arms closes. And my screen resolution is messed up. So i restart and my screen resolution didn't change back so i had to unplug it and plug it back in for it to come back. But then i start up combat arms and all of a sudden i start getting low fps spikes from 80fps to 20fps. And now it's always at 20fps. Help me :l

Re-install CA and try again

yea, try to reinstall CA if that doesnt work then its a graphics driver issue