This looks like a graphical issue with possible tearing. You may find that reinstalling your graphics card drivers fixes this. But to prove that it is the graphics card causing the problems, you can load up SolidWorks in Software OpenGl. This can be done by navigating to Start>All Programs>SolidWorks 20xx>SolidWorks Tools>SolidWorks RX 20xx. On the first tab of the RX tool, there are two safe modes at the bottom, one being load SolidWorks in Software OpenGL this loads SolidWorks without using the Graphics card at all. If the problem remains then it is not your graphics card cuasing the issue, if the problem is gone then the drivers should be reinstalled,updated or rolled back. If none of the drivers work then the card is possibly faulty - run this in benchmarking software such as that provided by FutureMark, this should show you how your card is performing under heavy load the artifacts may still be present there to.
i did it (SolidWorks in Software OpenGL)
And no display flaw.
I'm afraid my card is out.
I have alrady reinstalling the graphics card drivers.
That it strange when a tested with nvidia soft all is ok
That is very similar to the graphics anomaly caused by not using a Windows Aero theme.