Steve
Windows NT is an operating system, not an Office or Excel version.
What version are you running?
Version 97.
Excel 97 macro security is "on" or "off". No levels as 2000 and beyond.
Excel 97 does not support Digital Signatures.
Other than the user turning off the warning in Tools>Options>General there is
nothing that can be done.
In versions 2000 and beyond, macro security has levels from low to high.
Rather than setting security to low, I would use the selfcert tool to create a
didital signature that you would attach to the workbook.
On the other hand, if you mean there are no macros and you still get the
warning, perhaps you have an empty module left over or some lines in a
worksheet or thisworkbook module.
To get rid of that warning, visit Debra Dalgleish's site for info.
http://www.contextures.on.ca/xlfaqMac.html#NoMacros
Gord Dibben Excel MVP