How Can You Fix - Dell m precision is displaying a half screen. the rest is black?

Dell m precision is displaying a half screen. the rest is black

my dell m precision is displaying a half screen.
the rest is black....
l increase the resolution but nothing changes.
when l put another os xp servise pack 3 then install drivers the screen is displayed fully but when i put up windows 7 it displays half
screen.
what should l do and previously l was using windows 7?
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Original title need assistance

Anwsers to the Problem Dell m precision is displaying a half screen. the rest is black

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Make Sure that your Hardware Meets the System Requirements

You need to double-check your computer's hardware configuration against the following Microsoft requirements. If your PC hardware is not up to par, then make sure you update where necessary before continuing:

Microsoft Windows Requirements :

• 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
• 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
• 16 GB available hard disk space (32-bit) or 20 GB (64-bit)

If your computer meets the minimum requirements above, then continue on…

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