Hi Welcome to Seven Forums.
To help us help you would you please add your systems specs? Here's how: System Info - See Your System Specs Under System Manufacturer/Model Number add whether it is a desktop or laptop and whether self built. Log in to Seven Forums and you will be able to transfer the info directly to the specs page in your profile from within the System Info app.
After doing this your specs will be available in each of your posts. Click on My system Specs
in the lower left of this post to see how it should look.
Full instructions are in the tutorial.
Did you reinstall your audio driver
and enable it on BIOS?