Reset this PC completely broken

August’s Patch Tuesday broke Windows Recovery — the last resort for fixing a broken Windows installation. Attempting to “Reset this PC” would fail and roll back, leaving users trapped with whatever problems drove them to reset in the first place. Excessive UAC prompts appeared everywhere for good measure. Microsoft had to issue an emergency out-of-band patch KB5066189 a week later, because breaking the recovery system is the one thing you really shouldn’t do when your updates regularly require recovery.