You Xbox can't recognize this disc. Make sure it's an Xbox game, DVD movie, or audio CD. Also check to see if the disc is dirty or damaged. Remove the disc to continue.
I literally get that message at least 10 times before I can play any Xbox game. I used to think it was because I had the console in my basement during the winter, which literally got to about 45-50 degrees. I figured it just needed to heat up. But now I have it in my bedroom and it still does it, even though I chill in here at a comfortable room temperature of 70 degrees.
A few of my other friends are having the same problem, and we've come to the conclusion that it is just old. I got mine literally within the week it came out, as did most of my friends that are having the problem.
Anyone else run into this crap, or know what I should do?