Windows Update Error 0x800f0922

What is WU-0x800f0922?

Windows Update fails to install, typically caused by insufficient space in the System Reserved or EFI System Partition (ESP), Secure Boot configuration conflicts, or active VPN connection blocks.

Common Causes

• The EFI System Partition (ESP) has run out of allocated space for boot configuration files.
• Secure Boot is disabled or configured incorrectly in the UEFI motherboard settings.
• An active VPN connection or proxy is blocking communication with Microsoft Update servers.

Step-by-Step Fix Guide

• 1
  Disconnect from any active VPN client or proxy server and try running the update again.
• 2
  Verify Secure Boot is enabled in your BIOS/UEFI settings to allow system update validation.
• 3
  Extend or clean up the EFI System Reserved Partition (ESP) to ensure at least 15MB of free space.

Commands & Diagnostics