what graphics card do you use.. if your on windows do (command key ~ its the windows key) + r .. then type in.. dxdiag .. and hit enter to run .. if it asks you something to do with scanning for signed drivers or something just do no and then..
go to display tab and see graphics card model.. does it say intel onboard.. if it does and your on a lap top then that may be the issue.. if you have a dedicated graphics card then drivers are your next best bet
1. make sure graphics card is not onboard
2. make sure graphics card drivers are up to date
3. make sure all games files are not corrupted
4. fiddle with lower settings
5.. umm check to see if the os/anti virus or other program is causing issues
6.. erm idk