In Device Manager...I delete anything that is there which is not functioning properly...or which is not installed on my system currently.
If a device used to be installed/used...and now is no longer such...I remove those drivers.
I would remove anything related to the onboard sound function...as well as any items such as I have described above. I would uninstall anything that shows up as a troubled device currently...reboot...install drivers from the motherboard CD which came with the system (and which, presumably, worked before).
Typically, I don't let XP search for drivers...I use the browse option to point it to the folder where the drivers are. I do let the system/motherboard drivers CDs autorun if they have that capability.
Edited by hamluis, 23 September 2008 - 10:09 AM.