Change a Windows XP Product Key

You've installed your OS or entered your product key, but now you want to change it. How do you do it? You can use the Windows Activation Wizard graphical user interface (GUI) or a Windows Management Instrumentation (WMI) script. The Activation Wizard method is easier, but if you must change the product key for multiple computers, the script method is better.

Steps

Regedit

  1. Click start in the bottom left corner, then click run.
  2. Type 'Regedit' in the white text field, and click OK. This should open the Registry Editor.
  3. Navigate to the following registry key.
    • Hkey_local_machine\Software\Microsoft\WindowsNT\Current Version\WPAEvents
  4. Right click 'OOBETimer', in that registry key that you just navigated to and then click 'Modify'.
  5. Change one or more digits to anything random.
  6. Click start and then click run.
  7. Paste '%systemroot%\system32\oobe\msoobe.exe /a', in the white text field,.
  8. Select 'Yes, I want to telephone a customer service representative to activate Windows', then click next.
  9. Click "Change Product key"
  10. Type the new product key into the small white text fields and then click update.
  11. Check that you get a message similar to 'You have successfully activated your copy of Windows.', if you do, restart your computer, and you're done!
  12. Make sure you are connected to the internet in this process!

Windows Product Key Updater

  1. Click here to download the Windows Key Updater Tool.
  2. Run the .exe file
  3. Click Next. This tool will scan your system for any inconsistency or errors. Wait for the scan to finish.
  4. Type in the new product key. You might be required to activate your system again.
  5. Restart your computer. This will allow the changes to take place. You might be required to activate your system again.



Tips

  • Buy a genuine product key if yours is not genuine.
  • Alternatively rely on the support and specific tools from a 3rd party company that complies with Microsoft policy.
  • To navigate in the registry, click the small '+' buttons left of the words.

Warnings

  • This will not work when the installation source and the product key are representative of varying licenses. For example, if the installation CD is a retail license, but the product key is for an OEM license.
  • Never tell anybody your product key.
  • Do not use any product keys that you find on any websites, these could cause you to fail the windows genuine advantage test as those keys are probable already one Microsoft's product key blacklists. Failing this test loses your operating systems genuineness, restricts updates and displays annoying messages to buy a real product key.
  • Editing the registry (or any system file) is like surgery: BE CAREFUL! Don't edit anything except what this article tells you to when you open, 'Regedit'. Doing so can cause system instability, changes in functionality, or worse, be unable to use Windows altogether.

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