Hi Cuppa & Ozjeff,
I had a play again last night, checked all the permissions etc, even deleted and reloaded the GU electronic manual from scratch as suggested. I can open each page manually so the manual is accessible but when I use the hyperlinked button I have problems. I managed to get about 30% working on the hyperlinks. I think the error is as ozjeff suggests, when I downloaded the adobe reader I did a quick app search and got something called "Adobe reader ++". Which looking again is not the correct program needed.
I will goto the adobe website and download the correct Adobe Reader and give it another go.
Will let you know how I fair,
Thanks,
Gavin