The NVIDIA PureVideo Decoder combines the industry's highest quality DVD and MPEG-2 playback with rich surround sound audio and provides the best experience with Microsoft Windows Media Player and Windows Media Center Edition.
Featuring Dolby Digital surround sound audio and hardware-accelerated video on all Microsoft DirectX compatible graphics processors, the NVIDIA PureVideo Decoder delivers unmatched color fidelity and smooth DVD, video, and TV viewing. The NVIDIA PureVideo Decoder is also the best way to experience PureVideo on your NVIDIA GeForce 6 Series GPU, enabling such features as spatial temporal de-interlacing, inverse telecine, and bad edit correction.
The NVIDIA PureVideo Decoder is the first software decoder to receive the "Designed for Media Center Edition" certification, ensuring that it will deliver premium video quality and unmatched performance for Media Center PCs. In addition, the NVIDIA PureVideo Decoder is designed to work with Portable Media Centers allowing users to take their recorded TV shows with them on the road.

If codecs are figuring out they're running from debugger (also if used from programs with Armadillo), they will not work anymore. So, be careful while using it.