An introduction to computer audio
My WMP takes a good 30 seconds to play a song and also most of them skip. I had a Dell XPS with Widows XP before, and WMP was perfect. I recently bought another XPS with Vista and it's on this computer that I have the problems.
Skipping of tracks on Dell machines is common if they have the Sigmatel audio chipset (sound card) installed, because Dell ship them with defective audio driver software.
and you should be fixed up.
Another option is to remove all third party drivers and use Vista core audio drivers only