change sn windows xp

Go to / Start Menu/ Run/ Type regedit and click OK.

Before any operation in the registry, he should make a backup of the registry as a precaution

* In the Registry Editor, click File then Export and save the registry at a place where you can find the file.

* Expand the options until you get the key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\windowsNT\CurrentVersion\WPAEevents

* Then on the right panel, change the value OOBETimer by changing the number.

* Close the registry.

* Start Menu> Run> Type:

%systemroot%\system32\oobe\msoobe /a

* Choose Activate Windows by phone, then click Change Windows key and then enter your new key and click Update.