HP Pavilion dv7 1464nr -No sound after updates

Yesterday I started doing the updates suggested in Health Check.  One of them said I had to have UAA Bus Driver installed before I did the update (for the IDT High Def Audio CODEC), so I downloaded & installed that 1st.  After that was downloaded & installed I didn't have any sound whatsoever.  I'm not a complete novice, so I right clicked on the Sound Icon down on the system tray, chose "Playback Devices" and made the "Speakers & Dual Headphones" the default.  Everything seemed to be working fine.  A few minutes later, no sound again.  So, I did a System Restore Point back to before I did all the updates.
I've got other updates waiting in the Health Check & I'm scared now to let them download & install. 
Have you any thoughts on this?
Thanks in advance,
MaryEllen

I never trust Health Check with downloading updates for my laptop. Go to your driver page and manually check for any new drivers/software:
http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=2100&lc=en&dlc=en&cc=us&product=3998676&lang=en
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