XP/2000/2003: Play DVDs in Windows with Free Decoder Software
Contributed by AlexTheBeast 
Tagged: Windows No reason to buy expensive DVD playing software. Packages are available for free.
I was sad to see a buddy of mine paying a ton of money for DVD software for his system. Several free packages exist.
Video Lan is an amazing piece of software IMHO. It’ll play DVDs (and almost every other media file) without problems. Over 12 OS supported.
Equally impressive is MPlayer. It plays DVDs and most other media files without issues. Multiple translations available.
Zoom and BSPlayer are both free players that have pro versions that you can purchase. I have used them and they work well.
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Mary Chalk said on December 30, 2008
why did i use to be able to play dvds on my computer with Windows Xp and now i can’t? ittells me i need a compatible decoder;i installed videolan and it still won’t work!
Anonymous said on January 2, 2009
It is a codec thing. If you install a codec pack like the Vista Codec Package (http://www.free-codecs.com/download/vista_codec_package.htm) or K-lite (http://www.free-codecs.com/download/K_lite_codec_pack.htm) it should work.
Joseph Parambi said on October 25, 2010
I want the ISO file to play on my DVD player.
I wrote the dvd with iso file but does not play on my dvd player
What to do?