Make sure you have the correct certified video card driver installed. I had the same problem a few months ago, and updating my driver fixed the problem.
Run the SolidWorks Rx > Diagnostics tool to check the graphics card & driver suitability.
If they are OK and you have an nVidia card, check the settings mentioned in
and see also https://forum.solidworks.com/message/396828#396828
As the others have said, it's possible your video driver is too new to play nice with Solidworks.