Windows Media Player needs a spetial DVD pack that you need to purchase from the Microsoft website. Also PowerDVD has free updates that will make it compatable with XP or you can go the PowerDVD 4.0 XP route. Also make sure that you have the latest video drivers and make sure they are fully compatable with XP.
On another note, I have an ATI Radeon, PowerDVD XP and WMP with the required DVD pack. But when I try playing the a DVD with WMP the DVD plays thorough the required inroductions and the FBI warning but when I aclualy start the real movie I get an error. Anybody know what gives? Both PowerDVD and the new ATI player work fine but I would still like to try the WMP as it may have some uique features.
Thanks