Hello all,

I've tried many different methods and can't seem to nail this one.

Basically, I have a spreadsheet that is useful and would like people to download and use it. However I want to enable it so that once the spreadsheet has been download (and I supposed opened for the first time) that it can't be then be used on any other PCs other than the target one it has been sent to.

I thought about using the "User" i.e. =GET.WORKSPACE(26) and putting it in a hidden cell the first time the excel spreadsheet was used and then seeing if this matched each additional time the spreadsheet was used. This however is very crude and could lead to a lot more potential problems I'd have thought.

I don't know of anything else that the spreadsheet could use to identify the users pc uniquely. Was wandering if any of you guys have had this problem before or have any solutions?

Many Thanks for your times
Paul