How can I change the product key when I activate my Windows XP installation?

A. When you install XP, you must enter a product key to register the software with Microsoft. However, if you want to use a different key to activate the software after installation (e.g., maybe you originally used an existing key during installation and have since purchased a new license), perform the following steps:

  1. Start the activation process as usual (go to Start, All Programs, Accessories, System Tools, then select Activate Windows).
  2. Click "Yes, I want to telephone a customer service representative to active Windows," then click Next.
  3. Click the "Change Product Key" button.
  4. Enter the new key, then click Update.
  5. Click Telephone, then continue with the activation.
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