Windows 11 Version 24H2 Cumulative Update Preview for x64-based Systems (KB5062660) (26100.4770) for 2025-07

Microsoft has released the 2025-07 Cumulative Update Preview for Windows 11 Version 24H2 for x64-based systems. This optional update, labeled KB5062660 (Build 26100.4770), brings a variety of performance improvements, bug fixes, and system enhancements designed to fine-tune the upcoming major release of Windows 11.

If you're someone who likes to stay ahead of the curve and test out features before they are rolled into the next Patch Tuesday update, this preview update might be for you. Here’s everything you need to know.

What's New in KB5062660?

1. Improved System Performance

The update focuses heavily on refining system responsiveness and overall performance. Several minor background processes have been optimized to reduce CPU usage and enhance battery life, especially on laptops and 2-in-1 devices.

2. Fixes for File Explorer and Taskbar

A number of irritating bugs in File Explorer have been squashed. For example, an issue where the Explorer would crash when opening certain folders is now resolved. The Taskbar has also received fixes related to incorrect app icon alignment and task view glitches.

3. Windows Copilot Enhancements

With AI integration becoming more central to the Windows ecosystem, KB5062660 enhances Windows Copilot functionality. Users can now expect faster responses, improved app integration, and more accurate voice commands.

4. Fixes for Sleep and Wake Issues

Some users reported issues where their systems failed to properly resume from sleep or hibernation. This update includes targeted fixes that aim to stabilize sleep/wake transitions, especially on newer x64-based laptops.

5. Improved Compatibility for Apps and Drivers

Microsoft has addressed compatibility issues with some third-party applications and outdated drivers. This will result in fewer crashes and a smoother experience for apps that rely on hardware acceleration or specific system APIs.

🔧 How to Get the Update

Being a Preview Update, KB5062660 is optional and won’t be installed automatically. You can install it manually by:

Going to Settings > Windows Update
Clicking Check for updates
Selecting Download and install under the optional updates section

It’s ideal for developers, testers, and advanced users who want early access and don’t mind dealing with occasional bugs.

⚠️ Should You Install It?

Since this is not a security update, it’s not critical for most users. If your system is running fine and you don’t need the new enhancements or fixes, you can safely wait for the official August Patch Tuesday rollout.

However, if you’re dealing with specific bugs listed above, or if you're a developer or IT admin testing compatibility, it’s worth installing and reviewing.

Update Highlights Summary:

Feature/Area	Improvements
Performance	Better battery life and reduced CPU use
File Explorer	Fixed crash and folder glitches
Taskbar	Icon alignment and app preview fixes
Windows Copilot	Enhanced AI response time
Compatibility	Fewer app and driver conflicts

Final Thoughts

The KB5062660 (Build 26100.4770) update preview gives a good sneak peek into what Microsoft has planned for the next big release of Windows 11 24H2. While it’s not mandatory, tech-savvy users and testers can benefit from its performance boosts and issue fixes.

Make sure to back up your system before installing any preview update and always read user feedback in the Windows Insider forums to avoid unexpected issues.

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