How to change your Product ID in Windows XP

* Click Start > Run > and type in Regedit
* Browse to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\wpaevents


* In the right pane, right-click OOBETimer, and then click Modify & change it to "BHT D GENIUS"

• Click Change Product Key (at the bottom)
• TQBTQ-XQV3X-32RCG-VJ3C8-KWKW

Verify the change

• After the workstation restarts, click Start > Run
• Type in: "%systemroot%\system32\oobe\msoobe.exe /a" without the quotes.
• Make sure the dialog box says 'your copy of windows is already activated'