August 2025 Cumulative Update for Windows 11 Version 24H2 (KB5063878 โ€“ Build 26100.4946)

Microsoft has rolled out the August 2025 Patch Tuesday update for Windows 11 Version 24H2, targeting x64-based systems. This cumulative update, labeled KB5063878, advances the OS to Build 26100.4946 and introduces a suite of performance enhancements, AI-driven features, and system reliability improvements.

๐Ÿ” Security & Stability Fixes

  • Mandatory Security Patches: Addresses vulnerabilities discovered in previous months, making it a critical update for all users.
  • System Stability: Resolves issues where devices became unresponsive, particularly during boot or when using File Explorer and network services.
  • Quick Machine Recovery: A new feature that automatically detects and fixes widespread boot issues using Windows Recovery Environment (WinRE). It connects to the internet and applies targeted fixes via Windows Update.

๐Ÿง  AI & Copilot+ Enhancements

  • Settings App Overhaul:
    • On non-Copilot+ PCs: Search bar moved to the top center for better accessibility.
    • On Copilot+ PCs: AI-powered search suggestions now guide users to relevant settings based on natural language queries.
  • Recall Feature Updates: European users can now export and reset Recall data, aligning with regional privacy regulations.
  • Click to Do Actions: Expanded to include Reading Coach, Immersive Reader, and Draft with Copilot, with integration into Microsoft Teams.

๐Ÿงฉ UI & Usability Improvements

  • Start Menu: Admins can now configure Start Pins to apply only once, allowing users to personalize their layout post-deployment.
  • Snap Layouts: Inline messages and keyboard shortcut tips improve discoverability and usability.
  • Black Screen of Death Redesign: A more readable layout with technical details, aligned with Windows 11โ€™s visual style.

๐ŸŽฎ Gaming & Performance Boosts

  • Gamepad Keyboard Enhancements: Improved controller navigation and support for signing in using PIN via Gamepad layout.
  • Performance Fixes: Addresses FPS drops in games like Fortnite reported after the May 2025 update.
  • Intel Driver Synergy: Intelโ€™s August 2025 GPU driver (v32.0.101.6987) complements this update with up to 6% FPS uplift and GPU memory override control for Arc GPUs.

๐Ÿ“ฅ Installation & Availability

  • Automatic Rollout: The update is being pushed to all eligible devices via Windows Update.
  • Manual Download: Available through the Microsoft Update Catalog for offline installation.
  • Size: Approximately 3.05 GB for x64 systems.

๐Ÿ“ Final Thoughts

KB5063878 is more than a routine security patchโ€”itโ€™s a strategic upgrade that enhances Windows 11โ€™s resilience, intelligence, and user experience. Whether you’re managing enterprise deployments or optimizing a home lab, this update delivers meaningful improvements across the board.

๐Ÿ—‚๏ธ KB5063878 โ€“ August 2025 Cumulative Update Changelog

CategoryUpdate Details
๐Ÿ” SecurityFixes multiple vulnerabilities; includes updates from KB5062660
๐Ÿง  AI EnhancementsUpdates to AI components like Image Search, Semantic Analysis, and Settings Model
โš™๏ธ Settings UISearch bar moved to top; Copilot+ PCs get AI-driven suggestions
๐Ÿ› ๏ธ Stability FixesResolves system freezes and boot issues post-May 2025 update
๐Ÿš€ PerformanceBoosts FPS in games like Fortnite; improved responsiveness
๐ŸŽฎ Gaming FeaturesGamepad keyboard supports PIN login and better controller navigation
๐Ÿงฉ UsabilitySnap Layouts now show shortcut tips; Start Menu pinning policy updated
๐Ÿ”„ Servicing StackSSU KB5065381 improves update reliability
๐Ÿ“… Secure Boot NoticeCertificates expire June 2026; advance action recommended
๐Ÿงช Known IssuesNone reported as of release date

changelog-category-1024x683 August 2025 Cumulative Update for Windows 11 Version 24H2 (KB5063878 โ€“ Build 26100.4946)

As you can see in the visualization above, the dashboard offers a clear breakdown of the KB5063878 changelog by category. Each bar represents the relative detail volume for that category, giving you a quick sense of where Microsoft focused its efforts in this update.

๐Ÿ” Highlights from the Dashboard:

  • AI Enhancements and Stability Fixes received the most attention, reflecting Microsoft’s push toward smarter and more reliable systems.
  • Gaming Features and Secure Boot Notice are more targeted, but still crucialโ€”especially for users managing hybrid environments or gaming setups.
  • Known Issues shows zero entries, which is a good sign for deployment readiness.

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