Windows 11 Memory Integrity (HVCI) expansion: what KB5127936 and the October 2026 rollout mean
KB5127936’s gradual-rollout [Security] notes expand Memory Integrity (HVCI) across eligible Windows 11 devices (builds 26200.9818 / 26300.9818): supported PCs may have Memory Integrity enabled during updates while respecting existing user or IT choices. The Windows IT Pro Blog (Sep 2026) explains the October 2026 quali