Follow the following steps to hide folders without using any software:
Firstly, create a new folder.
Right-click on the newly created folder and from the the menu select Rename option.
Hold Alt key and press 9 key nine times and then press Enter key. You will see a blank folder name for that folder.
Again right-click on that folder and select Properties.
From the properties window, select Customize tab.
Select Change Icon form the Folder icons part.
Now, select a blank folder icon form the Change Icon for Folder window.
Click on OK button.
Again, click on OK button of the folder properties.