I would strongly urge everyone to get a decent security package like Norton and then TURN OFF ALL WINDOWS UPDATES!
My computer was fine until a blasted update arrived before I got to switch them off. Also an elderly friend of mine just got to know how to use his new computer and half way through his session the blasted Windows 10 update just started without him wanting it and left him completely confused as to how to work his computer. I will not be getting Windows again and in any case look at the disgusting salaries of the bosses!