Microsoft released the source code for the original Windows File Manager that was released about 28 years ago with the Windows 3 operating system. 
Η application κυκλοφόρησε αρχικά στα Windows 3.0, και αντικατέστησε τη διαχείριση αρχείων μέσω του MS-DOS. Ο κώδικας πλέον έχει “πειραχτεί” και έτσι η Ancient application can also run on Windows 10! 
Η mode however, the app's functionality hasn't changed since it allows users to copy, move, delete and search for files, which it did some 28 years ago.
Ο Source Code (for those interested) is available on GitHub and is maintained by Microsoft veteran Craig Wittenberg with permission from MIt.
Wittenberg copied the file management code from Windows NT 4, 2007 and maintained it until it finally opened it for the public.
If you want to find out what Windows looked like in today's environment (Windows 10), or if you are one of those who want to remember the application, you can download it from GitHub.
https://github.com/Microsoft/winfile/releases
You have to be a masochist to want to try something like this.
Here File Explorer has weaknesses and can be improved - Think of the obsolete File Manager.