well let's see what we can figure out.


so you went to - settings -control panel -sounds and devices -
and then clicked on the sounds tab and for the sound theme you selected -no sounds- and clicked the apply and then the OK button?

that's how I turned my sounds off.
some webpages will still have a sound or notification beep or ding dong sound.

Did you try the "click to install updates" to see it it stops after that is done