90312, I think I may have found the problem. I was reading some other posts because I had received one error that said CSS error–cannot copy blah, blah.
Reading some posts about that it appears that following the directions that I received from Avangate, I downloaded the nonCSS version of the software and installed it, not realizing the problem. I have now done a clean uninstall and a new install; presently, my Full Disk copy is progress without any griping. Perhaps, then, the problem was all due to that nonCSS version.
If you would be kind enough to check this thread tonight, I will post my results, but I think I may have solved the problem.
Many thanks for your input! I must say it is very confusing to have two websites that provide different versions of the same software…