With the bit along the bottom being the taskbar, the icons next to the clock form the system tray, usually with task sceduler being the last on left
If you hold the mouse pointer over any of them, you should get a brief description of what these are, and do.
If none are the volume control, perhaps a speaker icon, then click start, settings, control panel, double click multimedia, click devices, click + next to audio devices, not the name, click the MIDI tab and check it is the same device, then click audio to check playback is also the same device, click advanced properties for playback to see it is set to use the type of speakers you have
Double click audio HQ then look for volume there, or mixer to adjust the volume