This is a common issue with Office 97. No fix or cure will be forthcoming from Microsoft.
Have you considered Open Office from http://www.openoffice.org ?
I am the sole user of my PC.
When I open a document in one of my folders I recieve this message:
[A document with the name "......xls" is already open cannot have two opened with same name close or rename one of the documents.] OR [would you like to make a copy of this document?] I do not have two opened nor do I need to copy a document. So how do I get rid of this message?