Microsoft Rolls Out KB5062552 Update for Windows 11, Delivering Key Security Fixes, Performance Enhancements, and New Features

Issaquah, WA – July 8, 2025 – Microsoft has released a significant cumulative update for Windows 11, designated KB5062552, for systems running on OS Builds 22621.5624 and 22631.5624. This mandatory security update brings a host of improvements aimed at enhancing system security, boosting performance, and fixing a range of bugs.

Critical Security Enhancements

As part of the July 2025 Patch Tuesday, this update addresses numerous security vulnerabilities within the Windows operating system. The release tackles 76 vulnerabilities in total, with five classified as critical, reinforcing the security posture of Windows 11. One of the notable security issues addressed is a Microsoft SQL Server Information Disclosure Vulnerability (CVE-2025-49719) that has been publicly disclosed and reportedly exploited in the wild. The update also includes important updates to Secure Boot certificates, which are set to expire starting in June 2026, to prevent potential boot issues on personal and business devices.

Performance Boosts and Stability Improvements

Users can anticipate a more responsive and stable experience with this update. A key performance enhancement addresses a long-standing issue with Windows Search, where the search box could take over 10 seconds to load. This fix is expected to significantly improve the usability of the search function.

Further stability improvements include:
* Optimized memory management to reduce system crashes and enhance application responsiveness, especially during high-demand operations.
* Improved power management to decrease battery consumption during idle periods.
* A fix for a bug that could cause media controls in taskbar preview windows to flicker.
* Resolution of an issue where the Settings app would become unresponsive when dealing with User Account Control (UAC) and display color calibration.
* Addressed a problem that could lead to system unresponsiveness during complex Storage Spaces Direct workflows.

Notable Bug Fixes

This cumulative update resolves several known issues, contributing to a smoother user experience. These fixes include:

  • Windows Hello for Business: An issue preventing the automatic renewal of expiring certificates has been resolved.
  • Storage Optimization: A problem that hindered the complete removal of unused language packs and Feature on Demand packages has been fixed, freeing up storage space and potentially shortening Windows Update installation times.
  • Graphics: A fix from a prior release that could cause black screen issues during display changes, such as connecting or disconnecting a monitor, has been addressed.
  • Multimedia: An issue where notification sounds for on-screen alerts, volume adjustments, and sign-ins did not play has been corrected.
  • Windows Firewall: An issue in the Event Viewer, logged as Event 2042, indicating a "Config Read Failed" has been resolved.
  • Start Menu and Taskbar: The update fixes a problem where the Start menu might not open with certain input methods and another where taskbar icons could become unresponsive after resuming from sleep. The WIN + CTRL + Number keyboard shortcut to switch between app windows is now working correctly again.
  • File Explorer: An issue causing the navigation pane to show incorrect folder structures has been resolved, and the speed and reliability of network file transfers have been improved.

New and Enhanced Features

Beyond fixes, KB5062552 introduces and enhances several features:

  • PC-to-PC Migration: A new feature is beginning to roll out that facilitates the transfer of files and settings between two Windows 11 PCs using the Windows Backup app. While currently in a testing phase, this feature aims to simplify the setup of a new computer.
  • Windows Share: When sharing links, a visual preview of the web content will now be displayed in the share window.
  • European Economic Area (EEA) Browser Defaults: For users in the EEA, setting a default browser will now automatically apply to more file and link types.
  • Taskbar Customization: The taskbar can now automatically resize icons to accommodate more apps when space is limited.
  • Copilot: The reliability of the Copilot key has been improved, and an issue preventing the restart of Copilot after using the key has been fixed. For Copilot+ PCs, a new "Ask Microsoft 365 Copilot" action is available.
  • Accessibility: The Accessibility menu in Quick Settings has been redesigned for better clarity, and text descriptions have been added for assistive technologies. Voice access has been expanded to include Simplified and Traditional Chinese.

Known Issues

Microsoft has acknowledged that some users might experience intermittent disconnections with certain Bluetooth devices and screen flickering with specific graphics drivers. The company is investigating these reports and plans to release patches in future updates.

Installation

The KB5062552 update is a mandatory security update and will be downloaded and installed automatically through Windows Update for most users. A system restart will be required to complete the installation. For those who wish to install it manually, the update is available from the Microsoft Update Catalog.