Speakers not detected

im currently using zorin os ultimate lite 64 bit dualbooted with win 10 pro.
i am not able to hear any sound form zorin whereas the sound is coming from windows perfectly. when i opened the sound mixer , the output is showing (s/pdif)(something like that) only and not my speakers or anything else. i had very hopes but the only problem is coming is the speakers are not working. please help. my pc runs win 10 very slowly thats why i dualbooted.

Can you try some of the suggestions here?