"Open in Explorer" Icon is disabled in document Library

Problem : "Open in Explorer" Icon disabled in document Library
Environment : Sharepoint 2010 - windows 10 - Browsers tested : IE edge + Mozilla FireFox

Solution : Copy the URL of the document Library & then Make a Mapped Network to that URL

It will open smoothly, if you have the permission needed.

How to map a network:

1. Open 'File Explorer'.
2.  Right click on the 'Computer' icon, select 'Map network drive'.

3. Select a ‘Drive’ letter from the drop down box that is not in use. 

4. Copy the document library URL.
   Note: copy only to the top-level of the document library, for example - https://collaborate.deakin.edu.au/division/esolutions/TeamInformation/<document library name>/folderA/folderB/folderC

5. Paste this URL in the ‘Folder’ textbox. 

6. Click “Finish”.

The entire document library is now available to you when you click on the relevant network drive.