First open Command prompt(start>run>type "cmd")
Now type the command given below hide or unhide the folders..
The command to hide the files is
Attrib +s +h drive:\folder name
To retrive your file use this command
Attrib –s –h drive:\folder name
For example:Lets assume that there is a folder called ‘X’ in drive ‘D’
I will hide it by use the command
Attrib +s +h D:\x (press enter)
That’s it you done it.If you want it back
Use this command
Attrib –s –h D:\x (press enter)
What happens when you change the attrib as shown above , The folder becomes PROTECTED SYSTEM FILE
Thats pretty small hah..