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System keeps asking to reactivate Windows XP

Whenever I try to reboot my Windows XP Pro machine it asks me to reactivate Windows XP. It always reactivates with no problems, but this is getting a little annoying. Any suggestions would be appreciated.

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The behavior you're seeing is obviously not normal, however before you reactivate again, try running the system file checker utility. Click Start --> Run --> and type "sfc.exe /scannow" without the quotes. This utility checks to see if critical system files have become corrupted and it replaces them. If it doesn't work, I would consider reinstalling XP before you run out of activations.

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