Computador deixou de dar som

Boas pessoal..

O meu computador deixou de dar som assim de um momento para o outro. Já pesquisei na net soluções, já meti ascultadores e isso nada resolveu, eu meto o som e o volume no máximo e não dá. Alguém sabe o que poderá ser?

Obrigado

EDIT: Consegui resolver o caso utilizei isto

Código:

Method 6: Reload the current sound driver
If you discovered in method 5 that the sound driver was not installed, or if you discovered that the sound driver was installed but is not working, try to reload the sound driver. To do this, follow these steps:

    Click Start
    Start button
    , type Device Manager in the Start Search box, and then press ENTER.
    In the Device Manager dialog box, expand Sound, video, and game controllers.
    Locate the audio device that was included with the computer.
    Right-click the device, and then click Properties.
    Click the Driver tab, and then click Uninstall.
    Make sure that the Delete the Driver Software for this device check box is cleared, and then click OK.
    In the Device Manager dialog box, click the Action menu, and then click Scan for hardware changes.

    You receive a message that states that a hardware device is being installed, and then the uninstalled audio device appears in Device Manager.
    Close the Device Manager dialog box.