I got around to upgrading my personal laptop to Windows 8.1 (from 8-no-decimal) the other day. I did a total backup first like a good boy first, and strictly from habit set a new restore point before that, though I suspected that was pointless–that is, that all the old restore points would be wiped by the changeover. After the upgrade was finished I decided to check, and found that I was right–but also that System Protection, which had definitely been on beforehand, had been turned completely off, which I took to mean that no new restore points would be created.
I turned System Protection back on, of course. But is there a non-bug reason the upgrade would have done this?
It’s likely that the changes are too sweeping, drastic and numerous to be safely and cleanly undone by a system restore - so it doesn’t seem entirely unreasonable that this upgrade might wipe out previous restore points.
But as for permanently turning off system protection, I don’t think that’s a feature. Pretty sure that didn’t happen to me when I made the jump from 8.0 to 8.1.
I actually expected all the restore points to be wiped away by the upgrade to 8.1; part of the reason I checked was simply to see if I had guessed correctly. It was the turning off of system protection that surprised me.