If you witness distorted graphics in the scenarios, it is likely you have an ATI graphics card for which the driver simply needs to be updated.
To do this, go to this URL and follow these instructions.
From the Download Drivers box, select your system. When done, select the tab that says "Individual Downloads" and download the Catalyst Control Center. We have found that as on some computers, the ATi installer does not update the drivers. Only the full Catalyst Software Suite does work (as of Sept. 1, 2011).