That's the boot sector on the CD.
Things to try:
- Use your burning program to do a CD-copy from the original to a backup copy and use that.
- Use your burning program to create a bootable CD (if it offers that possibility).
I copied the contents of my XP disks to folders on my hard drive.
Then I copied the contents of those folders back to cd's.
My pc won't boot from them - it doesn't recognise them as bootable.
Why not? What is the difference between my backups and a bootable cd ?