Where is the volume icon on my Toshiba Satellite?

hold the FN and then the volume keys on the keyboard. If nothing then go to control panel then on the upper right click view by large icons, then look for sound, then click it, then double click speakers, then click on levels, then adjust the sound to your preference. At least here you can adjust the volume for now till you get the sound icon back. If nothing here works then you somehow erased your sound cards drivers or sound card failure, or virus, or programming error or a lot more. A lot to try to explain here.