Microsoft believes that this has been subject to much casual abuse.
This page tries to fill that gap by explaining WPA in a straightforward, detailed way - and to show that it will be a lot less trouble to most people than many have feared.What’s the idea of WPA?The Microsoft License for use of Windows has always been limited to allowing installation on only a single machine (and that excludes having the same copy installed on a laptop as well as a desktop machine: only MS Office is licensed for the combination). But the rampant misinformation is understandable, because it is hard for the general consumer to find a simple yet comprehensive explanation of just what WPA is. WPA is a fairly easy-going check when Windows boots, confirming that it is still installed on the same computer as last time it checked.