window not detect bluetooth hardware after reinstallation

i have reinstall window viata after having some startup problem. after that it donot detect bluetooth hardware as i tried 'add hardware' in control panel. i also download bluetooth driver and when try to install this message appear -"turn on bluetooth using radio switch or by (Fn+F2)" i use both but no result.

toolbar show no any bluetooth icon.no option come related to bluetooth in control panel after reinstallation which appeared earlier.

 laptope=inspiron 1525

thanks