Just to help with what keef wrote:-
DIR /AH will do a directory listing of hidden files.
DIR /AS will do a directory listing of system files.
DIR by itself will not list hidden/system files or directories without the above switches.
Unfortunately DIR is mutually exclusive in showing hidden/system files or not showing them so if you do DIR /AH it will show only hidden files not all other files as well.
Should you frequent using the dos prompt you may wish to set the DIR environment variable DIRCMD so that your directory listing is always familiar and sorted.
EG I use:
SET DIRCMD=/O:GEN
Which sorts the directory listing to G (directories) then E (Extension) and then N (Name).