I just bought a MBP 13" and tried to install Windows 7. In my organization, the program is available for download and each has to write it on DVD by themselves. I burnt the disc with my new MBP and used the disc for the installation. After the Boot Camp partitioned the disk, it asked to insert a disc. When I did so, this message showed on a black screen, "Not Bootable device -- insert boot disk and press any key." I think it's because my disc is not bootable. My problem is, after that, whenever I turn on my MBP, the black screen comes up. Now, I have to press ALT every time I start the machine. Could anyone please kindly suggest how to make it start normally again? Thanks a millions.