Microsoft has made it clear it was going to be a forced update by a certain date. They are going to discontinue (eventually) all other operating systems. They have their Windows 10 baby now, and all the other OP systems were just the lead up to combining regular computer with app capability so there can be "across all device" usage (just as Apple does).
Behind the scenes, unbeknownst to anyone (unless you are a techie and examine every update that comes in), they have been putting all the updates needed to change to windows 10 on your computer, to just sit in wait for the forced Windows 10 download.
Very sleezy, almost feels illegal. There is a thread here in Electronics that has a good program to download that will block Microsoft from being able to download it automatically.
Win10 still has a lot of problems when put on over an old operating system. Still a lot of conflicts (which are really a pain because then you spend half your time on tech boards trying to find an answer to any particular problem). There are some great tech boards that have trustworthy information to fix glitches.
I downloaded the blocking program. So happy someone posted it here.(in electronics)