Check your resolution. Be sure it's set the same as before. Some LCD's will do this on lower resolutions. If it's a CRT, make sure you're res and Hz are the same. You know how you can adjust the size of the picture? Well sometimes this is dependent on the resoultion and Hz. If you went from say 72 to 60 Hz, your screen size might change due to default settings.
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Desktop * Athlon X2 4200 | 2G RAM | 160G HD | 7600GT
Laptop1 * C2D T5550 | 3G RAM | 120G HD | Intel x3100
Laptop2 * C2D T5250 | 2G RAM | 160G HD | Intel x3100
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