You can download the 15 free lessons from here on a PDF file.
This is a free lesson from The Computer Manual, if you are interested in a computer basics manual, and or tutorials, visit the TheComputerManual.com to see the contents and pricing of the book and the video tutorials.
Anywhere in an open window, Desktop, C:\ right click on the empty space and from the popup menu hover over the New menu and select folder.
Or file -> new folder from any open folder window, like Documents, C:\ drive, My Pictures, and so on.
