Changing the Serial Number of Windows XP.

There is a way to change the number of windows xp operating system.Ever you try to change your serial? If so this information may be helpful to you. There are 5 steps in this tutorial

Step 01: First Go to Start then Run and type the command regedit click OK to open registry editor.Then Go to [HKey_Local_Machine\Software\Microsoft\WindowsNT\Current Version\WPAEvents,]
on the right double click on “oobetimer” and change at least one digit of this value to deactivate windows. Click OK and close the Registry Editor.

Step 02: Open Start Run and type the command:
%systemroot%\system32\oobe\msoobe.exe /a
click Enter This will bring up the “Activate Windows” window.
Check the option for “Yes” and then “I want to telephone a customer service representative to activate Windows” and click “Next”

Step 03: Then click “Change Product Key” don’t enter any other information on that screen

Step 04: Type in the new key and click on “Update”. The activate Windows by phone window will reappear at this point, just close it by clicking the X in the upper right hand corner of window.

Step 05: This step is the verification step and it’s the last step if you done what I already told you before then you should pass this step. Reboot your system and Go Start Run and type the command:
%systemroot%\system32\oobe\msoobe.exe /a
and click ENTER
If you see “Windows is already activated” then you are done!