[torrent file dont recognize bit torrent]

hi i have problems after downloading a torrent file

after downloading  a torrent my bit torrent icon don't appear on the torrent file  and by clicking on it says choose a default program mean while there is no  torrent program  in  that bar (default program chooser bar on windows )

i tried choose default program on windows default setting on   control panel,  and there is no TORRENT file mentioned on control panel setting

i need help

thanks