Re: PC Updated itself last night
As the machine is now Microsofts they can do whatever they like with it and whenever they like.
SatNad has decreed that all PC's running windows will run Windows 10 and they will control them like the fictional Borg did with people.
Declare your resistance to the MS Borg and install Linux. You won't regret declarings independance.
I did years ago and have not looked back.
The suggestion about the R-Pi is a good one. I have several in use now including one as my Firewall.