Organizations with IT-managed Windows devices and updates. Availability of this support: Registry keys are included in updates released on or after the following date: November 11, 2025: For versions of Windows still in support. Secure Boot error events .

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Learn how to enable virtualization through the UEFI (or BIOS) of your PC to run the Windows Subsystem for Android or Windows Subsystem for Linux.

Plan and perform Secure Boot certificate updates across your device fleet through preparation, monitoring, deployment, and remediation. In this section.

Learn how to format a flash drive to NTFS on a Windows PC.

To upgrade your device, you'll need to free up 15MB of space on the SRP using the appropriate method below, and then try the upgrade again. If you're updating Windows 10, you need to free up 13MB. Press the Windows key + R. In the Run window that comes up, type diskmgmt.msc and press Enter.

Run the following commands from an Administrator command prompt to restore the boot files in EFI system boot partition. Type each command separately and then press Enter:

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 boot (start) sequence.

Disabling Secure Boot significantly reduces device protection, removes safeguards against boot‑level malware, and can create new security and compliance risks. The recommended path is to ensure your device receives the updated 2023 Secure Boot certificates and any required OEM firmware updates.

If you see error E305 when you try to update your Xbox console, this means there may have been a problem installing the update. Find more solutions here.