Your best bet would be to turn off automatic updates so that they can't shove windows 10 on your machine!Actually, I upgraded to win 10 a long time ago. Check out the earliest posts in this thread.
This makes it all the more maddening that I have to deal with the kind of obtrusive stealth updates that I endured last night.
Thankfully, my Windows 7 machine (which I am using now) isn't trying to force-upgrade to windows 10. The windows 10 icon (in the taskbar) doesn't appear for me. And windows 10 doesn't appear in Windows Update. All is good.
My dual boot machine, which is DB 7/10, has the Windows 10 flag in the Windows 7 taskbar, telling me that I should upgrade to windows 10. However, Windows 10 is not appearing under automatic update... which is good, because I don't want windows 10 on that partition. I already have a partition that has windows 10 preinstalled on to it! Windows 7 is to keep program compatibility. Having a dual boot of Windows 10 Home against Windows 10 Pro is not helpful at all and defeats the object of setting up dual booting!