Sound system not working in only windows

[mounika]

I am using Windows 7 professional OS... and i got some problem with my sound system..
But when I rebooted my system with Backtrack OS.. I could listen the startup sound. and nothing other than that. As it is a live OS I am using,i didn't install any media players.. so couldn't check other sounds in Backtrack...

but in windows i couldn't even hear the startup.. I 've tried reinstalling the sound drivers. But it was of no use..

 

[pra40]

Check in the system device manager, whether you have any yellow marks. If nothing works try to upgrade the BIOS by flashing from USB.Take this as a last option.

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