Click Start > Control Panel > System and Security > Turn automatic updating on or off. In the Important updates menu, select Never check for updates. Deselect Give me recommended updates the same way I receive important updates. Deselect Allow all users to install updates on this computer and click OK.
About turning updates on/off: I think that works for the pro version, but not the Home Edition.
Also, my Control Panel doesn’t have a System and Security icon. It has a System icon, and a Security icon.
I’ve read that one possibility for dealing with this is to mark your wireless connection as metered. But, I prefer to connect directly to my router with a cable.
In any event, if MSFT has logged my return to 1603, and just gives me updates relevant to that, I’ll be happy. Or, if they figure out what the problem is, I’d be happy to upgrade. They sort of threaten you by stating that if you don’t upgrade, your system will still work, but won’t have their latest security updates.
For real? If I can truly turn off MS spyware and control updates on my own time, might consider 10.