Just follow these simple steps:
1. Create a new folder on the desktop.
2. Rename your folder and hold ALT key & type 0160.
3. you have a create a new folder without a name.
4. Now right click on this folder and select properties.
5. Go to customize tab and click on Change Icon button.
6. Now select the empty space from the list of icons given there.
7. Click OK. Done
Now hide folders and save your data in it.