You will need
  • A computer running the operating system
Turn on the computer and immediately during its booting continuously press "DEL". A menu will appear BIOS. Look for the command "advanced". Click on the tab "onboard configuration". Look for AUDIO and set the status to Disable, that is "off".
Return to the main menu of BIOS. When you exit the BIOS you are prompted to save or cancel the new settings. Click Save And Exit. The computer restarts. Wait until you start Windows.
Now check in the BIOS sound. To do this, simply press and hold any three keys for five seconds. If you are not issued any sounds, then you did everything right. It is worth noting that not all motherboards support manual disable sound in BIOS, in many this feature is simply absent. In such cases, you need to do some manipulation with the motherboard inside the computer.
Completely disconnect the computer from the power supply, pulling the power cord from the outlet. Open the computer cover. On the motherboard, locate the inscription "Onboard sound". Next is transactions. Gently pull the wire from the contact.
Now make sure this wire does not touch any components on the motherboard. Attach the wire bundle to the common wire in the system unit. In any case, do not leave it in that position, which was removed from contact. Otherwise it can get lost in the cooler and cause damage to the components. After you disconnect the wire and insulate the possibility of contact with the parts of the computer, close the cover of the system unit.
Turn on the computer and check for sound, as described above. If done correctly, the sound in the BIOS should disappear. To turn sound back just sticking pull the transaction back to the contact on the motherboard.