Vielleicht nützt Dir diese Info:
Any Windows version since Windows XP includes Windows Product Activation (WPA) to prevent piracy. With WPA, Windows "dongles" your product code to the hardware you are using. This process is called "Activation".
Your product code can only be used three times to perform an automatic Activation (over the Internet) after which you must call Microsoft to be able to activate again.
The data that has been generated during this process is saved in a file called "WPA.DBL" (\system32 path). When you need to repair your installation, this file will be deleted, so after your repair of this Windows installation you need to activate it again.
Saves the file "WPA.DBL" to the path your specify (for example, an USB stick etc.). Once you need to repair this installation, simply copy the WPA.DBL back to the \SYSTEM32 folder and the activation will be done.
A good description what WPA is all about can be found at:
http://aumha.org/win5/a/wpa.php
(by Alex Nichol)