So I just built my first computer, put everything together, turned it on, and inserted the Windows XP disk I had from a previous comp. The problem is, all I get is "DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER." I don't know what the problem is. I thought I might be missing a cord to the DVD drive (all I have attached to it are the power cable and the master cable), but I don't think there are anymore that would fit. This is the drive I'm using: http://www.newegg.com/Product/Product.aspx?Item=N82E16827152076 ...and I really hope it's not broken. Any help would really be appreciated.