Windows 10 Issue
We have found in some cases after upgrading to Windows 10 the World Wide Web Publishing Services is turned on and can cause this issue.
Click on the search button next to the start menu button in the Windows 10 taskbar and type "Administrative Tools".
You can either hit return or click on the "Administrative Tools" link that Windows finds for you.
A control panel window will open with a list of tools. The one you want is "Services." Double-click it.
Another window will open called "Services." Locate the one named "World Wide Web Publishing Service."
Right-click "World Wide Web Publishing Service" Then select "Properties". In the window that appears, choose "Stop" then locate the "Startup type" dropdown, and set it "Manual." Click "Apply" or "OK" to save your changes. You should be all set.
Please let us know if this does not resolve the issue or if you need further assistance.