IT basically means you need to set your wmp as your player see: http://www.gnutellaforums.com/showth...threadid=12041 &
http://www.gnutellaforums.com/showth...threadid=21818

And for video, you need to set the default app for watching videos & make sure u have all the appropriate codecs for your video app in order to be able to open & watch the different formats that movies come in. Do a search on the forum for codec. There's a no. of threads that tell u where to find them or find alternative video players.