Change Windows XP Cd Key/Serial Without Using 3rd Party Software

Need to change your Windows XP CD Key/Serial? The following is a way of doing it without using third party software or tools. This can also be added to a script and used in Group Policy!

Solution

Deactivate Windows

  • Click Start, and then click Run. Type regedit, and then click OK.
  • Find the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\Current Version\WPAEvents
regedit
  • Double Click OOBETimer, and then click Modify. Change the digit of this code
edit OOBETimer

This will deactivate windows and allow you to input a new key

Reactivate Windows and add new product key

  • Click Start, and then click Run.
  • Input the following command.
%systemroot%\system32\oobe\msoobe.exe /a
  • The activate windows application will open. Click Yes, I want to telephone a customer service representative to activate Windows, and then click Next.
Telephone XP
  • Click Change Product key.
  • Type the new product key in the New key boxes, and then click Update.
  • Reboot!

4 Comments (Newest on top)

  1. Jimmy says:

    Sir,

    I did exactly what you instructed but nothing comes out, that is, the page “Let’s activate windows” does not come out. Please advise.

    I bought this HP XT878 from an auction a few years ago and found the OS XP pro is not genuine. The computer got a warning window from MS. Recently I changed to a genuine product key from MS website, the MS warning (appeared on the lower right corner)is gone but the small star sign in the bottom tool bar still exists. I did your process once again but it still does not work. Please help.

  2. Jimmy says:

    Sir,
    Thanks for the reply. It is a small sign of star shape located in the bottom right corner indicating failure of OS authenticity test.

    • Ben says:

      A few sites mention that IE7 needs to be uninstalled from C:\windows\ie7\spuninst.exe
      then IE8 needs to be installed (download first)

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