VLC kept freezing and WMP gave me this message "Windows Media Player cannot play this DVD because a compatible DVD decoder is not installed on your computer"
PowerDVD is what I use. I used to use WinDVD but it is more of a hog.. As far as getting media player to work you are missing a codec/s. Go here and download one of the codec packs http://www.free-codecs.com/ and install