My old Win95 com suddenly lost it's sound.

It says there is no prefered hardware in the multimedia control panel. There are no audio devices in the advanced tab.

Tried "Add new hardware" but none is detected.

Restarted the com but didn't work too.

(Happened once before but after "Add new hardware" and none is detected plus a restart the audio is back)

Anyone has solutions???
(I am really worried about my "old friend")