Is there anything toxic in it? You know how Microsoft is sometimes. I saw a bunch of new things appear in my Task Manager while it was installing without my permission. I wondered why my computer slowed down, looked there and then saw a bunch of Windows installing things. Most of them are gone now, but we'll see what happens after I restart this machine.
WindowsUpdate websites would probably tell me what was in the install, but they of course wouldn't tell me if it is bad for my system, hence I come to you.
And lastly, has anyone else had this happen to them lately? I've had this computer for three years and it's never installed updates without my permission before, and no one accesses my computer but me.