I have a Dell E6500 Laptop running Windows Vista Business 32bit SP1. Since it arrived, and since being issued to the user responsible for it, it has since come back to me with complaints that the audio is crackly.....I've done the following:
Reinstalled the driver 3 times
Removed the driver all together and let Windows install a generic driver
Ran the diag to check the hardware only for the diag to say its fine
Had Dell replace the system board
Checked the audio headset port to see if the issue persisted there as well and it does
Audio is crackly through the built in speakers, and in a headset through the audio headset port. I've done everything except blow away and reinstall Windows. Can you think of anything I've maybe missed?