If you need to validate your Windows XP just follow these few steps.
1. Click on Start and then click on "
Run"
2. In the Open box, type "
regedit" and give "
OK" 3. In the left panel, look for the following route:
HKEY_LOCAL_MACHINE \\ Software \\ Microsoft \\ WindowsNT \\ Current Version \\ WPAEvents 4. In the right panel click with the mouse button on "
OOBETimer" and then click on
Edit.
5. Change at least one digit of this value to disable Windows. You can now close the registry editor 6. Click "
Start" then click on "
Run"
7. In the Open box, type the following command "
%systemroot%\\system32\\adobe\\msoobe.exe /a" and click "
OK"
8. Click "
Yes, I would like to call by phone to a customer service representative to activate Windows"
9. Then click
Next.
10. Click on the "
Change the product key."
11. Enter the new key product in Tables New key click Update.
USE THIS KEY
V2C47-MK7JD-3R89F-D2KXW-VPK3J
Click on "
Update".
Note:
If the product key for any reason does not work, go to the page and look www.serialz.to ahy more key validation. Source: http://mherrera16.blogspot.com/2008/01/como-validar-mi-xp.html