1. Press the 'Windows' and 'R' keys on the keyboard simultaneously. This opens a 'Run' dialog at the bottom-corner of your screen.
2. Type 'Devmgmt.msc' in the 'Run' dialog and click the 'OK' button. This loads the 'Device Manager' in a new window on your screen.

3. Double-click 'Sound, Video and Game Controllers' to expand the list of audio devices.
4. Right-click 'IDT High Definition Audio CODEC' and click 'Update Driver Software.' This opens a 'How do you want to search...?' dialog window.
5. Double-click 'Search Automatically for Updated Driver Software.' Your computer will first search the Windows directory on your hard drive for a valid driver. If a valid driver is not found on your hard drive, the computer will automatically connect with the Microsoft Update server to download a compatible driver.
6. Click the 'Close' button when notified Windows finished updating your hardware and restart your computer.