Paul,
Thanks for the suggestion. Yes, the Dell Vostro I purchased does use an integrated graphics accelerator. I, too, thought THAT was the issue. But wait...
I messed around with the WINDOWS > SYSTEM PREFERENCES > OpenGL > and CHECK the "Correct reversed picking driver bug" and UNCHECK the other two [Use hardware accelerator and Use fast feedback]. That did the trick. [Simply checking the bug fix didn't do it...you have to UNcheck the other two options.]
It's working as it should ...
Louis