Show Hidden Files

my pc was affected by a small time virus which disabled the use of :show hidden files n folders in folder option 

soution:

1. 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.

Now you should be able to view all the hidden files..