I have the same problem like WavyGravy with my Lenovo Thinkpad Z60m laptop I formated the machine and reinstalled Windows.
Now I have no sound and this message:
"The HDA Audio bus driver is required and not found."
Everything else on the system seems to be functioning fine. I am using Windows XP with SP2 and all current updates installed.
I saw the sollution for WavyGravy,but with me it did not work.So can you please tell me which drivers I need to install from: