Open in browser returns server not found
I have several Web pages on my laptop that give different results when trying to preview them in a browser from Dreamweaver 2017. A file in a site at C:\Users\myname\subfolder\subfolder\index.html works fine when I right click on the filename tab in Dreamweaver, click Open in Browser, and then select a browser (both Firefox and IE were successful). However, when I try the same procedure with a file located at C:\folder\subfolder\index.html, Firefox returns "Server Not Found," and IE returns "Unable to find file," or some other 404 type error. Additionally, when I create a completely new and very simple file, save it on the desktop, and test it with Open in Browser, it also works file. What am I missing with the erroneous scenario??
I've read many posts, but haven't found an answer, so thanks in advance for your help.
