Well, integrated intel chipsets are well known as notoriously not fully supporting OpenGL although these (most) modern ones are said to be better than the first series. I would recommend to try to find an update for your video driver and test with HW acceleration turned back on. Are you sure there is no other card in the system? Some laptops are manufactured with a built in chipset as well as a dedicated card and the user has to define which application should use which video card.

Thank you Gaieus! That did the trick. I then drew lines to define the portion that protruded and deleted everything above. Thanks again - you have saved me numerous hours of trial and error travelnbake