I have given up finding a solution to the problem. I no longer use Adobe Acrobat Professional full as I have tried both updates 8.0.1 & 8.0.2 to no avail, and is now unsupported as Adobe is up to version 9 of this software. I have opted for a freeware solution, so I have uninstalled Adobe Acrobat Professional and installed the freeware CUTEPDF Writer at www.cutepdf.com
. It works beautifully on Vista X64 on all documents, including Microsoft Word and Scanned Images and Photos. I'm very happy with the results.