Windows Update Error 0x800f0922 (Secure Boot / Space Issue)

What is 0x800f0922?

This error is triggered when Windows Update fails to install due to a secure boot configuration mismatch, insufficient system reserved partition space, or a connection failure to Microsoft servers.

Common Causes

• Insufficient space in the System Reserved Partition (SRP).
• Secure Boot is enabled in UEFI but the update's boot files cannot verify signatures.
• Proxy/VPN connection blocking access to Microsoft's validation servers.

Step-by-Step Fix Guide

• 1
  Check and increase the size of the System Reserved Partition using a partition manager.
• 2
  Temporarily disable Secure Boot in UEFI settings to allow update completion.
• 3
  Verify and repair network settings, ensuring no custom proxies block the update.

Commands & Diagnostics