Run the command prompt

Click on "start", "Run ..." then type "cmd" and click on "OK"

In the command prompt type "net config server /hidden: yes" and "Enter"

A message tells you that the command succeeded or failed.

Restart the computer to accommodate the change.

Note: Some delay can occur between the time you restart your computer and when it will no longer be in My Network Places.

To cancel the change and make visible the computer simply by typing the command "net config server / hidden: no"