How to make a folder invisible.

Click the folder u want to make invisible and press f2 to rename the folder.
press Alt+0160
and then press enter
then the space of the name will be empty.

Now go to properties of the folder, go to customize end then click on 'change icon'
here u can see many icons as well as a blank space .It is an invisible icon.

Now that folder is invisible. You can only realize that icon by selecting the area.

You can make it visible again by reversing the process.