Please don't strain the fabric of the space-time continuum with claims of coincidence.
Since I don't have 8/8.1 I don't have a EULA. If the installer alters system files, it might void that. Hence the warning which I quoted. If you think that's ludicrous, that's your problem.
I will assume that's a joke. Because it was coincidence. If you don't believe that, then that's your problem. Doc, you seem a bit hostile. I don't see why. I meant no offense.
But the idea of Microsoft voiding a "warranty" due to something I decide to install on my PC is ludicrous, regardless of who said it.
So ridiculous, in fact, that I'm suprised you repeated it.
Sensing your hostility, I will exclude myself from further comment on this thread.