Now it may well have been something I've done when doing a tidy up But :-
My windows Media Player once played dvd's although that's along time ago.
Now when I put a film in I simply get a message
"Windows Media Player cannot play the DVD because a compatible DVD decoder is not installed in your computer"
Trouble is it should have them because they are part of the basic XP set up.
I can't remember what version I was using originally, but took a Microsoft update to version 11
hoping that would overwrite my non working version, but no change in the error message.
I can play video from my small camera running .MVI
I don't like the idea of trying to upload codecs from some other source and obviously don't want to reinstall my XP home
with the probable loss of years of information within this small box of tricks !!
I have managed a couple of years without it working, but want to solve the problem & not go out into a cold garage to put DVDs into an old windows 98SE system any more.