To hide your folders without the usage of folder lock :

Suppose u want to hide a folder named "Movies" which is in D: drive of your computer

Go to command prompt
start--->run--->cmd-->d:

After changing the path from C: to D:

Type D:/>attrib +h +s Movies
Action: The above command is used to hide the folder "Movies"

To show the folder

Type D:/>attrib -h -s Movies
Action:The above command will make the folder "Movies" visible