[how do i update my graphics driver so it can launch the second life program?]

I downloaded the SL viewer and was using it for about a half an hour.  I then exited the program and when I went to launch again--the error message: "Launch failed,  update graphics driver!" appeared.  I since have been unable to get into Second Life.  I was on the phone with my computer's tech support for an hour and still we could not troubleshoot the problem.  There has to be something that works.