Suppose u want to hide a folder named games which is in D: of ur computer
go to command prompt
start -> run -> cmd -> d:
after changing it from C: to D:
Type D:/>attrib +h +s games
This Command will hide your folder
To show the folder
Type D:/>attrib -h -s games
Using this Trick you can hide your folder which cannot be viewed even if you make advance search or even if you change the folder option to show all hidden files.