if you need to open the DOS shell, prompt, command line, from the file explorer application.
Enter into the folder and ...
Windows Vista/7/8.x/10
In the newer versions of Windows, you do not have to install anything. Simply hold down the Shift key and right-click a folder. The context menu will contain an entry, ‘Open command window here.”
from http://www.techsupportalert.com/content/how-open-windows-command-prompt-any-folder.htm