Thanks Milo, I downloaded and tried isobuster but from that it looks as if the disc is not mounting, it makes all the noises but then shuts down and is not seen.
The worst thing is I had them yesterday but as said I didn't import them, leaving it to later
I made 2 CD-R of photo's about 4 years ago, been kept in boxes, and have looked at them occasionally just to check, they were made using windows xp, the second one loads and imported to her laptop perfectly, but the other just will not and, according to the properties, it is full (all blue) but, used, free and capacity all read "0 bytes"
Looks like I might have to go to the professionals
Regards, Den.