How can i see hidden folders in pc

performed the following Steps but the modify key value reverts back to 0. 
Go to Start --> Run, then type Regedit 
2. Navigate to the registry folder HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\ 
CurrentVersion\Explorer\Advanced\Folder\Hidden\SHO WALL 
3. Find a key called CheckedValue. 
4. Double Click CheckedValue key and modify it to 1. This is to show all the hidden files.)