Step 1. First you need to make your folder having blank name , to do this just rename your file by typing Alt+255 Now your folder is without name
Step 2.Now Right click on your folder
Step 3.Select properties
Step 4.Click on Customization tab
Step 5.Now click on Change icon
Step 6.Select a balnk icon like this
Step 7.Now clcik on ok then apply it
Step 8.Now make your folder view option as medium or small icon
Now your folder is totally invisible , for better result keep it in desktop .Have fun ,thanks.