Thanks for your incredibly fast reply.
I backed up all my Adobe products to D:, downloaded that tool and ran it. Although I selected option 7 (CS6) it insisted I run 1. (All). I let it run but it did not seem to find whatever downloaded as part of the trial software.
I am now down to 62Mb free space on C: which is bringing up all sorts of warnings and I know that the Photoshop s/w will be taking about 10Gb - if I could only find it. Do you know what directory it is put into, or a file name I can search on? I don't have a lot on C: and scanning through the Program directories shows little I am not familiar with. I am at a loss as to where it has gone.
Do you have any other ideas about where to look to find the files downloaded so far?
Also, what is the total size of all files for the evaluation? I had 10.6Gb free when it started out - I know my drive is small SSD (60Gb) and I have a 128Gb SSD just waiting to go in when I get Windows 8 onto it. But for now I need to locate those downloaded files - any thoughts?