Norton Ghost 15 and Blue screen

I have used Ghost several times to recover from dumb mistakes. The last time was just a few weeks ago with no problem. I make progressive restore points every day on schedule. I had need to use it yesterday but when I tried to boot from the disc I got a blue screen stop. (Image here.) I did a repair install of Ghost with no joy so now, I need help please. I am using Windows XP SP3. Let me know if I need to supply more info.

Ken