need decoder help please!

my girlfriend was easreing stuff in the add/remove programs page and she easred somethng and when we tired to watch a movie a note popped up and said something like missing dvd decoder or something we used to watch movies on it all the time but after she erased something it wont play dvds no more and says something about missing a dvd decoder. can anyone help by telling me where i can go to download one or something like that. thanks =).

sorry for the reply post but i i tired downoading windows media again but nothing should i remove window media player all together and then download it again? last time i just downloading media player with the other one still active. do you think it would work? thanks

Without knowing what software you use to watch dvd's with, I would say the easiest way to repair the damage would be to use System Restore to restore your pc to a time before it was uninstalled.

so if i system restore that will work? if i do that will everything from that day be restored including media files and mp3 files? but most importantly the dvd decoder.

Software will be restored, personal documents and music shouldn't be. However any changes you make with system restore can be reversed if it doesn't solve the problem, so it's reasonably safe to do.

Media Player Classic is freeware, has a built-in DVD decoder, I believe.

Anyway, good luck with system restore!