I have SW 2013 SP 4.0 in my computer working with NVidia Quadro 4000. I created a new user and with this new user I cant open parts and assemblies (neither start a new one). The only i can do is create a new drawing.
I think is a problem of the Graphic card and the compatibility with the software.
If that doesn't help then open SOLIDWORKS and with no open file go to Tools > Options > Performance and select Use Software OpenGL. Now open files and check. If this worked then it is a graphics card issue.
Nonetheless, use Rx tool to diagnostic the issue and send to your VAR.