Need macro so file can not be saved without giving it a new name

Create a "template" version of your main workbook. Save it as MyFile.xltx.

Now add that template to your templates folder and/or put a link to the template on your desktop somewhere convenient. Use that link to open the template for "use".

When you open a template in this manner, it is opening a "nameless copy" of the template. The use MUST give the new workbook a name, the same as is true the first time you create any workbook. Try it out, should give you all security you need. It insures the user saves each "use" as a new file and it keeps anyone from hurting your real master copy you have saved elsewhere.

You want to save it as an xltx if it doesn't contain macros, and an xltm if it does.