I have the same problem when I try to install windows 7 32 bit.
A error code 5 is coming. It is before windows 7 installation start. I did try to burn the iso file with star burn portable, and another program, I did use a low burning speed and did test the dvd on the computer at work and there is working with no problem. I did burn 5 dvd up til now with no luck.
I have only one dvd player but can easely put a cd player in.
More with same problem??
One last thing I did try if it would boot from a linux dvd an one cd, and there is no problem. But with my backup program paragon drive express it have the same problem to boot from the cd.
Hope to hear from you