I appreciate that Microsoft, as an American company, wants to play nice with the music and motion picture industry, but the DRM matter does cause computer users inconvenience when the DVD zone/region code becomes set on one code number.
Other than the USA, where multi-region DVD players and the like are deemed illegal for retail sale, people around the globe collect legitimate DVD's from many sources in order to satisfy their viewing interets and pleasures, and after a few regional changes to their DVD drive settings, suddenly they are stuck with a stack of useless disks when using Windows Media Player!

Of course one may -   
    - install and use literally any other third-party video/media player (software)   
    - use a program to re-set or remove zone codes from the DVD drive (hardware)   
    - install and use a 'region killer' type application and all is well, including the use of WMP, but many users are not au fait with these workarounds.

Has anyone heard of a program or means of resetting the DVD drive region/counter within WMP? Even if this 'lock' is not a Registry type of setting, it is afterall only rock and roll, sorry, I mean software.