I have checked the cover of my UK sourced disk and see no explicit indication of copy protection so i AM PUZZLED as to how you are convinced this is so .
Sony have used copyright protection before and the method was it loaded a player off the disk to the hard disk which prevented you copying .
The fix was descibed on this forum and entailed pressing the shift key and stopping the sony player from loading .
If there is no copy protection which I believe to be the case , the stutter is either due to .
Poor media ( I use Traxdata )
Too fast a burn Speed (use slowest burn speed )
Other applications running in the background ( close all programs while burning)
A duff burner
Have you got a friend who can try burning the disk on another machine
Was the disk purchased in the uk