Had a look at Norton, can see how to stop things but not how to specify something that I know should be safe.
Also tried again to download but get this message:-
Message WZ13
This message is displayed if WinZip® was unable to open the requested archive. Specific causes for this error include:
•The archive file does not exist or is in use by another program.
•The specified folder does not exist.
•The file is not an archive.
•The archive has been damaged or corrupted.
•There were disk errors or insufficient memory while reading the archive.
•The archive contains invalid or illegal filenames.
If you are attempting to open an IMG or ISO file, please note that WinZip includes support to read and extract from ISO files and disc image IMG files. Many programs use the IMG file extension for what they would term "image data". In such a case, the "image" may be a graphic or it may be a digital image of a disc (or diskette). Attempting to open an IMG file that is not in the expected ISO format is one way to cause WinZip to display this error.
WinZip supports ISO file systems that include ISO 9660 and UDF from 1.02 to 2.6 (a subset of ISO 13346). Usually, CD images use ISO 9660, DVD images use UDF1.02/ISO9660 bridge, and Blu-ray Disc images use UDF 2.5.
If you are working with a Zip file, you can try repairing the file as described in Fixing Zip Files.
Don't know where to go from here, have to sleep on it.
Easiest way is if Dave would please put the track on Amazon S.