How to Change Microsoft Windows XP Home/Professional License Key

Note: ONLY 11 STEPS! Please follow this instruction PRECISELY.

1. Click on “Start” , and then click on “Run” .
2. In the Open box, type “regedit”, and then click on “OK” button.

3. In the left pane, locate and then click the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\Current Version\WPAEvents

4. In the right pane, right-click on “OOBETimer”, and then left-click on “Modify”.

5. Add 00 before FF; then click on “OK” button.
You can close “Registry Editor” by Click on “X”

6. Click on “Start” , and then click on “Run” again.
In the Open box, type the following command,
%systemroot%\system32\oobe\msoobe.exe /a
then Click on “OK” button.

7. Choose “Yes, I want to telephone a customer service representative to activate Windows” , and then click on “Next” button.

8. In this Windows, Click on “Change Product key” button.

9. Type in your Genuine product key in the “New key” boxes, and then Click on “Update” button.

10. Now you back to the previous window, click “Remind Me Later” to Close this windows.

11. This is the last step; restart your computer.

Note: You can go to http://www.microsoft.com/Genuine/ to validate your windows product Key.