How to Change a Windows XP Serial Number

If you have accidentally purchased a pirated copy of Windows XP and find that you cannot update it, or are getting error messages, you might have to reenter a new serial number. Read on to learn how to change a Windows XP serial number.

Things You'll Need

  • Windows XP
  • New serial number
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Instructions

    • 1

      Click "Start" and go to "Run." Enter the following string:

      %systemroot%\system32\oobe\msoobe.exe /a

    • 2

      Click "Yes, I want to telephone a customer service representative to activate Windows" and then click "Next."

    • 3

      Click "Change Product Key."

    • 4

      You will now be able to enter the valid serial number for your Windows XP.

    • 5

      Press "Update" and close the window.

    • 6

      Now restart your computer. Your version of Windows XP should now be updated with the new serial number.

Tips & Warnings

  • You can always choose to cancel before proceeding if unsure.

  • Do not enter an incorrect or illegal serial number. Windows will need to be reactivated afterwards.

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