Dapper Dan wrote:

Thanks Mart. I started out via the Google route, but before
downloading and using one I thought it prudent to ask. I'm ready to
experiment but if I can use someone else's experience, it may save me
a lot of aggravation.
Thanks again Mart, I appreciate your help.

Sorry I can't help Dan other than to suggest using Google which you have
already done. I've used BING to write zeros to entire drives but have
never attempted to do this to unused parts of a partition where I want to
retain the files. Defragging the drive doesn't really seem to help either
as I have found in the past that I have been able to recover deleted files
where the drive has subsequently been defragged albeit that was on a
system where the file system was NTFS.
--
Mike Maltby