Thanks, I tried that previously, but my computer is so new, there was nothing to restore it to. What I've ended up doing is downloading the free VLC media player from cnet.com and setting it as my default. It doesn't fix my problem with Windows Media Center/Player, but at least I can watch DVDs on my computer again, albeit not with WMP. I don't know that there are any other options to me unless I do a complete re-install from my computer's recovery disk and I really don't want to have to do that. Thanks for your advice.