Windows 11 and Secure Boot - Microsoft Support
Secure Boot is an important security feature designed to prevent malicious software from loading when your PC starts up (boots). Most modern PCs are capable of Secure Boot, but in some instances, …
Windows Startup Settings - Microsoft Support
Oct 14, 2025 · Safe mode starts Windows in a basic state, using a limited set of files and drivers. If a problem doesn't happen in safe mode, this means that default settings and basic device drivers …
Windows 11 and Secure Boot - Microsoft Support
Secure Boot is an important security feature designed to prevent malicious software from loading when your PC starts up (boots). Most modern PCs are capable of Secure Boot, but in some instances, …
Windows Secure Boot certificate expiration and CA updates
Jun 26, 2025 · What is Secure Boot? Secure Boot is a security feature in Unified Extensible Firmware Interface (UEFI) based firmware that helps ensure that only trusted software runs during a device's …
Frequently asked questions about the Secure Boot update process ...
Sep 15, 2025 · Secure Boot certificates allow the firmware to verify that critical components—such as boot managers, option ROMs (firmware drivers), and other firmware-based software—are trusted …
Secure Boot Certificate updates: Guidance for IT professionals and ...
Jun 26, 2025 · Important: All three Microsoft-provided certificates are set to expire beginning in June 2026. In collaboration with our ecosystem partners, Microsoft is rolling out new certificates that will …
July 8, 2025—KB5062560 (OS Build 14393.8246) - Microsoft Support
Jul 8, 2025 · Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot …
August 12, 2025—KB5063880 (OS Build 20348.4052) - Microsoft Support
Sep 14, 2021 · Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot …
Registry key updates for Secure Boot: Windows devices with IT …
Oct 14, 2025 · This document describes support for deploying, managing, and monitoring the Secure Boot certificate updates using Windows registry keys. The keys consist of the following:
KB5062688: Safe OS Dynamic Update for Windows 11, version 24H2 …
Jul 8, 2025 · Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot …