loud speaker is not working  

Can you try another port. (Is this lappy or desktop)
Can you test with another speaker.

You will find things happen in such a way to throw you off the track. It may not be the OS.

risvilaw said:

i'm using dell xps m1330 model laptop

recently i installed windows7 32bit, after the installation my loud speaker is not working
but i can hear through earphone

my sound driver is high definition audio driver i updated that
i didnt find any problem with driver

how can i solve this problem

in my device manager there are two basic system device without drivers error code 28

Are your headphones USB or do they connect via the onboard sound card ??

in my device manager there are two basic system device without drivers error code 28

could you take a screen snipp of this