As Direkiller above noted, the relevant update is KB3035583. Nuke that and all the popups and downloading-without-your-consent goes away. Uninstall it and then "hide" it to stop it from re-installing. Unfortunately, you also have to keep your eyes peeled because MS keeps on releasing new "versions" of 3035583 to bypass your having hidden it beforehand, because apparently hiding an old version of the same update doesn't count for the new version. I've lost count of how many times I've had to re-hide it, and I know the number off by heart now!
You may also wish to uninstall and hide KB3123862: it changes the Windows Update UI to heavily push Win10 and hide (though not remove) the ability to do normal Windows Updates to your Win7 installation. This one isn't critical because AFAIK its only a visual change, but not a helpful one.
You may also wish to uninstall and hide KB3123862: it changes the Windows Update UI to heavily push Win10 and hide (though not remove) the ability to do normal Windows Updates to your Win7 installation. This one isn't critical because AFAIK its only a visual change, but not a helpful one.