...or it just plain bricks the machine
I've got an middle-aged Vaio laptop, for which Sony's advice is roughly "oh god don't try installing Win10, definitely don't try upgrading, hold tight and in Q4 we'll give a status update". And as all experienced in the art of reading deadlines know: "in Q4" means at best I'll be drunkenly installing their new drivers as the New Years fireworks pop.
So having eager little bunny Windows Update trying to joggle me into a BSOD swamp is impressive: I never expected Sony to be the good cop in the room. Of course in theory I can roll it all back again as a bad fever dream, but it would be too much to hope that the eager bunny won't try again an hour later.