Windows appears to *conditionally* respect your stated preferences. So if you turn off Auto-Arrange, Windows says fine, but oh wait, you just did a Windows Update. No, sorry, all bets are off now. We are entitled to completely rearrange your icons, because
you just made a big change to your system so it's time to reevaluate all your preferences and, surely, you don't expect us to respect silly things like icon arrangements when installing a really important update, do you?
What are we to say to this other than, "thanks, mom"?
Default settings are decisively important for this very reason. No matter how much you configure your system (like, say, telling Windows to stop docking windows on the edge of the monitor screen), sooner or later, some update or app will erase your stated
preferences and return the system config to what the Windows O.S. team thinks most people want or *should* want. It frequently has something to do with their pissing contest with Apple, not customer input or genuine customer advocacy.