So I downloaded Nero 7 Ultra and it was working great for a little while and now when I try to burn DVDs, it says something about MPEG-4 Decoder has expired or something, which has something to do with it being pirated. Now, this happened to me once before when using Nero and I had to get like all these serial keys and enter them in to activate all these different codecs or whatever. Anyone care to enlighten me on this subject and offer some help? I know it's a bit confusing but I know some of you PC savvy people might know something. Thanks.