Hi all
Tks for your help with this. As of last night I usccessfully got CC Pro reinstalled on my PC. I removed avary last vestige and mention of CC from my pc, including the 5.68 install download, switched the pc off, re-downloaded install prog and succeeded . Not sure how much of that was necessary, but I was v frustrated by that time. Just glad to have it back working.
Once again, thankyou
David