Hi Apache1968,
The error you are getting isn't a common error message. When you used the HP Recovery Manager and restored it back to its original IDT driver did everything with the sound work fine?
There are two other methods of updating the driver. You can use the HP Support Assistant to check for any updates. I have included a link that will walk you through that. Scroll down until you see Updates and Tune Ups.
Using HP Support Assistant Windows 8:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03446545
Another option that you can try is updating the driver through the Device Manager. Open your Device Manager and then right click on the Audio driver and select update.
Opening Device Manager:
http://pcsupport.about.com/od/windows-8/a/device-manager-windows-8.htm
Thank you,