windows 8 crashed during restore

I have a month old Dell XPS 8700 with Windows 8 (later updated to 8.1).
The computer has been super. I am using ATI 2013 version. I did not have any problem with backing up and restore with ATI. An hour ago, I tried to restore the latest tib within windows. During booting, the screen shows only Dell logo. No windows 8.1. It seems that the windows 8 is crashed. I could not figure out how to start the computer and re-restore a tib. With Windows 8, when it is crashed, there is no way to boot from CD/DVD ROM. The computer came with "windows 8 Recovery Media" DVD disk. But it does not boot from DVD ROM unlike Windows 7. Could anyone advise me how to starts windows 8?