Microsoft Windows 11 24H2 Update Version OS Builds 26200.7628 and 26100.7628

KB5078127 updates Windows 11 25H2 and 24H2 to OS Builds 26200.7628 and 26100.7628. It is a cumulative out-of-band update that fixes cloud-storage file access issues and includes prior security and non-security updates.

• Includes security fixes from the January 13, 2026 security update KB5074109 and the January 17, 2026 out-of-band update KB5077744.

• Fixed an issue where some applications became unresponsive or errored when opening or saving files from cloud-based storage such as OneDrive or Dropbox.
• Fixed an issue where Outlook could hang when PST files were stored on OneDrive, potentially causing missing Sent Items or re-downloaded emails.

• The password icon might be missing or invisible in lock screen sign-in options after installing August 2025 non-security preview update KB5064081 or later updates.
• This known issue primarily affects enterprise or managed IT environments; Windows Home and Pro personal devices are unlikely to be affected.

• This update is offered through Windows Update only to devices that already installed KB5074109 or KB5077744, and it is also available from the Microsoft Update Catalog.
• For devices enrolled in Hotpatch, the issue is addressed via KB5078167 without requiring a restart.
• If the Windows Update setting 'Get the latest updates as soon as they're available' is enabled, the update is delivered automatically; otherwise install it manually from Settings > Windows Update.
• IT administrators using Microsoft Intune or Windows Autopatch should follow Microsoft guidance for expedited quality updates.

Product Information

Vendor: Microsoft

Product: Windows 11

Version: OS Builds 26200.7628 and 26100.7628

Release date: Jan 24, 2026