Do you have game booster, or fraps running on your PC, or any program that hooks DirectX and adds an overlay such as a FPS counter, if so, try disabling said program.
If you don't have any programs like that running, then my second guess would be a video card driver missing.
You can find the proper video card drivers on your computer manufacturers website.
Please let me know how it goes!
Thanks,
~RedEyes.