Just bought an IBM Thinkpad 600e with Win XP installed. Everything is working fine except I have no sound when booting. Going to device manager, I have the exclamation by "Crystal WDM audio codec". Properties for this has a code 10 device cannot start. If I uninstall and scan for new hardware, I have sound fine, but when I shutdown or restart, I have the same problem all over again. I am at a loss.