Window show (No Audio Output Device is installed)

TRY THIS.GO TO SERVICES AND RESTART WINDOWS AUDIO.

Yes your laptop's original Audio driver is not realtek, that is Sigmatel Audio, so you download your laptop's driver here:
http://esupport.sony.com/US/p/model-home.pl?mdl=VGNSZ430NB&template_id=1&region_id=1&tab=download#/downloadTab

you can install sound card

Well it is possible that the audio driver installed is not the one compatible with you computer board. Try downloading the specific driver needed for your computer's official website. This should solve your problem.

Hi.

The audio output device in your computer is the audio adapter board (or circuit). This is the device that produces sounds and send them to the speakers.

If you get a message telling you that there is no Audio Output Device detected, or that the Audio Device is not working, that usually means that there is a problem with the audio driver.

In that case the problem is often fixed downloading and reinstalling the drivers for your audio device. If there is a problem with the audio output device, go to the computer manufacturer website (e.g. Dell, HP, Sony etc.) and download the audio drivers for your specific model. When download is complete install the drivers and restart the computer.

Regards.

Ginko

Right click on it, press update driver.
Select "No, not this time", click Next
select install software automatically, Next
Vista should find the driver online.
Let me know if it didnt help. I'll give you other solution.

its a known issue --if you u upgrade vista home to vista ultimate.just u need to uninstall the audio driver and install it again

DO YOU HAVE YOU'R AUTO UPDATE ENABLED?

dear prakharsriva,
It shows that your audio driver is not installed. install the audio driver from the cd that is given with your motherboard that is compatiblw with your OS.

thanks,

give driver a nice blow or hand job... it will melt and in the end will be installed itself...if u r a girl with nice curves then show it to the device, it will ********** itself ;-) hope this information will help