I noticed the other day that my office computer chose to download Windows 10 on its own and I was told from my manager NOT to download. So I clicked decline on the terms and conditions. It restarted the computer with Windows 7 again except the wallpaper is now black with small writing in the corner saying something along the lines of "this may be a counterfeit copy of Windows." My boss then says to go ahead and download. Now it won't let me because my Windows version is not authentic all of a sudden. I tried to restore the computer to an earlier date and now it's installing an update that seems like it's frozen in the process. Can I turn the computer off even if it says not to? Please help so my boss doesn't kill me!!!!