KB5078127: Overview with user sentiment and feedback
Last Updated February 28, 2026
Probability of successful installation and continued operation of the machine
Overview
This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5078127) is cumulative. It includes updates from previous security and non-security releases, along with an additional fix. The update is offered through Windows Update for devices running Windows 11 that have already installed KB5074109 or KB5077744. It is also available for manual download from the Microsoft Update Catalog.
General Purpose
This out-of-band update includes quality improvements to address issues that were introduced in previous updates. Specifically, it fixes a problem where some applications became unresponsive or encountered unexpected errors when opening or saving files from cloud-based storage like OneDrive or Dropbox. In certain Outlook configurations that store PST files on OneDrive, Outlook may have hung and failed to reopen unless the process was terminated or the system was restarted. Users may have also seen missing sent items or previously downloaded emails being re-downloaded.
General Sentiment
The general sentiment towards this update is mixed. While it aims to resolve issues introduced by previous updates, some users have reported that the update process itself caused problems, such as uninstalling the classic version of Outlook and replacing it with the newer Outlook for Windows application. This change was unexpected and disruptive for some users who preferred the classic Outlook experience. Additionally, the update process was reported to be slow and time-consuming for some systems. Overall, the update seems to have addressed some critical issues, but it also introduced new problems for some users.
Known Issues
- Password icon might be missing or invisible in the lock screen sign-in options
- This issue is addressed in KB5074105
Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2026-02-28 01:10 AM
