Change serial number of Windows Xp

Do you ever try to change your serial number of windows xp operating system?
Here is the way.....
Step 01:

• Go to Start --> Run(or click Windows key +R) and open the run prompt

• Then 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 Run prompt (windows+R) 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 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!

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