You probably have your display resolution set too low. I can't tell you the correct resolution without knowing the make/model/size of your monitor, but here's how to make the change:
- Start Orb>Control Panel>Appearance and Personalization. Click Personalization and then click Display Settings.
- Under Resolution, move the slider to the resolution you want and then click Apply.
MS Windows Help - Change Screen Resolution in Vista:
http://windowshelp.microsoft.com/windows/en-us/help/0386b009-5f30-45c7-80c8-ff0395cc24091033.mspx
MS-MVP - Elephant Boy Computers - Don't Panic!