To Open to the C:\ Drive:
You would type %SystemRoot%\explorer.exe /n, c:\ in the Target area.
To Open to the C:\ Drive as the Root in the Folder Tree
You would type %SystemRoot%\explorer.exe /n, /root, c:\ in the Target area.
To Open to a Specific Folder (Ex: Downloads Folder)
You would type: %SystemRoot%\explorer.exe /n, /root, c:\ /select, c:\Users\(your username)\Downloads in the Target area. NOTE: Instead of using the path c:\Users\(your username)\Downloads, you can use the full path of the folder you want to have opened instead after %SystemRoot%\explorer.exe /n, /root,.
You would type %SystemRoot%\explorer.exe /n, c:\, /select in the Target area.