If u want to hide any folder without any software

1. create any folder or suppose already created

2. right click on folder, click properties, go to customize tab, at the bottom click on "change icon" tab

3. now select empty icon i.e no any icon picture. e.g see on the 13 column there r 2 empty icon. click on any both of them. apply/ok

4.now see ur folder , u see olny folder name not any icon.

5. now press f2 or rename it, no do not type any name instead press "alt + 255" now click on out side of the folder.
see ur folder will be Gayabbbbb.

to know where is ur hide folder, many tricks but best change the view to thumbnail