Windows 11 23H2 · KB5126653 · Build 22631.7652

October security update fixes File History backup and restore failures and tiered Storage Spaces Direct disks remaining offline. Microsoft corrected the OS build to 22631.7652 on 16 October.

What changed

KB5126653 was released on 13 October 2026 for Windows 11 23H2. The 16 October change log corrects the title and navigation build to 22631.7652; this is a documentation correction, not a newly released update binary.

Technical details

Fixed File History backup or restore failing with a misleading Reconnect your drive message.
Fixed tiered Storage Spaces Direct virtual disks failing to come online.
ReFS removable-media auditing enabled by default; enforcement remains disabled.
Secure Boot certificate deployment and British Columbia, Alberta and Manitoba time-zone updates.
Includes servicing stack KB5126652, build 22621.7641; do not confuse this SSU build with the target OS build.

Why it matters

The corrected build enables accurate 23H2 patch compliance reporting. File History recovery and storage availability need validation, while Enterprise and Education approach their final update on 10 November 2026.

Known limitations

Microsoft lists no known issues for this update as checked on 17 October 2026.
Windows 11 23H2 Enterprise and Education receive their final monthly security update on 10 November 2026.
Azure image version numbers are separate from installed OS builds.

Now check

Confirm Windows 11 23H2 edition and verify OS build 22631.7652 after KB5126653 and restart.
Test File History backup and restore to external drives or network locations; validate tiered Storage Spaces Direct workloads where applicable.
In WSUS confirm product Windows 11 and classification Security Updates; validate ConfigMgr deployment and compliance for the correct version.
For Dynamic Update media include version- and architecture-matched boot.stl to prevent boot error 0xc0430001.
Plan migration of 23H2 Enterprise and Education before 10 November 2026.