Im an architectural drafter. I do mostly 2d work but do some 3d work. I am using autocad mechanical 2008 and it runs smoothly until i type in a command and move the mouse. when i do this my mouse starts to skip around and it becomes dificult to focus and snap to any point. the other problem is when i am working with a 3d model and i try to orbit in any mode but 3d wireframe every thing becomes distorted and overshadowed. If anyone knows why this happens please help! this is not a huge problem, just a very annoying one.