If you go into Device Manager and select the device, you can roll back the driver.
Why did you update the driver, and how did you do that? I ask because Windows does not update drivers very well, and if you updated through the device manager this may be the reason. We would normally only update drivers direct from the product supplier, and only then if there are problems or bugs with the existing one.
I have a problem with my sound driver, after I updated to the latest Realtek HD driver I started having no sound. How can I fix it? BTW, I have Windows XP SP3