Activate XP using the Internet or Modem

• 1). Open the Start menu in Windows, then go to "All Programs > Accessories > System Tools," then click "Activate Windows." Alternatively, you can also click on the icon for "Windows Activation," located in the notification area of the taskbar (the steps for activating via internet and modem are the same).
  
  
• 2). Select the "Yes, let's activate Windows over the Internet now" option, then read the activation privacy statement. Press "Back," then "Next" to continue.
  
  
• 3). Choose between your activation options. These will be "Activation and registration" or just "Activation" (note that registration is not required). Click "Next" once you've chosen your option. If you selected the "Activation and registration" option, enter your contact information into the appropriate fields on the next page, then press "Next." Your copy of Windows XP Media Center will now be activated.
  
  

Activate XP over the phone

• 1). Open the Start menu in Windows, then go to "All Programs > Accessories > System Tools," then click "Activate Windows." Alternatively, you can also click on the icon for "Windows Activation," located in the notification area of the taskbar.
  
  
• 2). Select the "Yes, I want to telephone a customer service representative to activate Windows now" option, then read the activation privacy statement. Press "Back," then "Next" to continue.
  
  
• 3). Read the instructions given in the window that opens up and use your telephone to call the number given. Follow the directions given by the Microsoft customer service agent and your copy of Windows Media Center will be activated.