I am unable to view more than one SolidWorks file. 

Problem:  I am able to open one SolidWorks file but when I open a second, third, fourth, etc., these files do not completely open up.  The files act like they want to open but there is no image within the SolidWorks boarder.  I am not sure if this is a graphics problem with my computer but has anyone else encountered this problem or know of this problem?

I am using the SolidWorks Professional 2012 64-bit version.

It is saved onto a Dell laptop computer, model:  Latitude E6520.  The processor is a Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz.  The installed memory (RAM) is 4.00 GB.  The system type is a 64-bit operating system.  The Graphics Processing  Unit (GPU) I believe is an Intel(R) HD Graphics Family (HD Graphics 3000), total available graphics memory of 1696 MB (64 MB video memory).

Microsoft Windows 7 Professional has been loaded onto the computer.