Computer icon on desktop
The value of this icon is that a right-click will take you to the Manage item. From here, you get direct access to useful things, the main two being Device Manager and Disk Management.
Placing an icon is quite easy. Go to the desktop and right-click on any clear space.
A popup will provide some options - select the last one, Personalize.
A new window will open. At the top left, click on Change Desktop Items.
Now you can pick and choose which items to show - Computer, Network, Recycle Bin, User's files.