ok..sorry for the late reply..i have installed the driver,my onboard audio is enabled..but the sound is still a problem...maybe there is another sound driver i can download..cos the asus still shows unknown device.

no worries. your reply is not late at all.. we all need to do other stuff as well

About your still "Unknown" device in Device Manager

> Are you seeing any devices with yellow icons in Device Manager?
> Things labeled "Unknown" in DevMgr usually occur under USB and don't have the yellow icon (and your audio isn't USB)
> What category does the Unknown device appear under?
If you can provide a screen shot, it might help make it clear

You might also want to take a skim through [post=1002891]Guide to Troubleshooting Windows Audio and Sound Problems[/post]

As of your last dxdiag report, no audio device was being detected. You can also try
> Disabling onboard audio in BIOS, restart Windows.
> Then re-enable onboard audio and startup again.
Sometimes, toggling it off/on in BIOS sometimes helps (if the audio h/w itself hasn't failed)