Sound is not working

I installed windows 8 on my PC 3 days back. The problem i am facing is that it's sound is not working. I heard we don not need to install additional software to make sound working. But this is not working in my case.

Please help me resolve this issue.

Thanks in Advance
Reyna S
Content Management at WeAreHolidays

Welcome to eightforums Reyna.Would you please,fill in your system specs,would really help.What sound card are you using?Are you done updating Windows?Does device manager show installed sound devices?Do you have any indication of a song playing but no sound comes out of speakers?You sure you have plugged your speakers-headphones to the correct output,usually the green one?
Some food for thoughts...