I was able to uninstall a program that began with IDT from the date at which I think HP did the updating. This fixed the problem with the sound and the camera.
Now the HP support assistant box is again popping up in the lower right corner saying it is going to install updates in 13 minutes. Is it trying to sabotage me again?
Yes, it was. Trying to install IDT high definition (HD) audio driver. Should I let it try to do this again, or how can I keep it from doing this?