For some reason , I've never had any problems using windows 7 with my Hummy. Luck maybe, anyway just found this article explaining "How to" might be of use to someone, also a new codec pack for windows 7, which I've installed with no adverse effects.
http://blogs.msdn.com/b/e7/archive/2009/05/12/media-streaming-with-windows-7.aspx
http://www.windows7codecs.com/
According to the article this should work with vista and WMP11 .
http://blogs.msdn.com/b/e7/archive/2009/05/12/media-streaming-with-windows-7.aspx
http://www.windows7codecs.com/
According to the article this should work with vista and WMP11 .