Validating windows xp pro

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The machine's product ID will be located under the Registered To section.The script method is the practical solution for changing the product keys on a large number of machines.Regardless of the method you choose, make sure to backup important data before changing a product ID, since an unexpected problem could render the machine unbootable and necessitate a complete reinstallation of Windows.Click Start | Run and enter the command: At this point, Windows will launch the Product Activation Wizard.Select the option to telephone a Microsoft customer service representative to activate Windows, as shown in Figure A, and click Next.

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