First back up the registry by opening System Restore and setting a Restore Point.
Then open Regedit and navigate to the following registry key:
HKEY_CLASSES_ROOT\lnkfile
If you find the correct key, you'll see the following names,
(Default)
EditFlags
FriendlyTypeName
NeverShowExt
4. Add a new string value to the registry key,
Value name: IsShortcut
Value data: .lnk
5. Exit from Registry Editor.
6. Logout and login again or restart Explorer for the change to take effect.