Well, here are some possibilities:
Something is wrong with the CD
Something is wrong with the CD drive
Something is wrong with your motherboard
Something is wrong with windows
If the error only occurs at a certain time when running the CD, then it will be harder to track down.
If the error occurs right away trying to read the CD, then you can try this:
Here is a way to see if windows is the problem:
Search google for a "linux floppy."
Get the image, use it to create a floppy
Boot from the floppy
Try to read the files on the cdrom. You will have to use the command line to do it as the floppy won't have a GUI. Basically:
mkdir /mnt/cdrom
mount /dev/hdc /mnt/cdrom
cd /mnt/cdrom
ls
And you should see your files. Try reading the cd for a while.
If you need help

, post back here.
OR
If you have two CD-ROM drives, then you can search google for "knoppix," grab the ISO, burn it, and then boot from the CD into a GUI where you can just click "other CD" to look for your files in a graphical file manager.
~psi42