>Windows Media Player cannot play the DVD because a compatible DVD decoder is
>not installed on your computer while trying to play a DVD video on Windows
[quoted text clipped - 5 lines]
>with the vaildation question.
>Thanks for your help
If DecCheck says you already have one, try to switch to a media center
compatible DVD decoder in the list :
http://www.microsoft.com/downloads/details.aspx?FamilyId=DE1491AC-0AB6-4990-943D
-627E6ADE9FCB&displaylang=en
If not, you'll have to buy or use a trial version decoder -
Nvidia and Elecard make versions with free trials to test out :
http://www.nvidia.com/object/dvd_decoder.html
http://elecard.com/products/products-pc/codec-pack/mpeg2-decoder-plugin/
HTH
Cheers - Neil
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Digital Media MVP : 2004-2008
http://mvp.support.microsoft.com/mvpfaqs