What's new in KB5083631 (Windows 11 build 26200.8328)
- Windows 11 version 25H2 (Build 26200.8328)
- Windows 11 version 24H2 (Build 26100.8328)
Maya Reyes3 min readQuick answer
KB5083631 is an optional preview update released on April 30, 2026, for Windows 11 version 25H2 and Windows 11 version 24H2. It advances system build numbers to OS Build 26200.8328 and OS Build 26100.8328 respectively. Users can install it via Windows Update or download it manually from the Microsoft Update Catalog.
Microsoft released update KB5083631 on April 30, 2026, as an optional non-security preview update for PCs running Windows 11 version 25H2 and Windows 11 version 24H2. This update brings the operating system build numbers up to 26200.8328 for version 25H2 systems and 26100.8328 for version 24H2 systems.
As a late-month preview release, KB5083631 offers early access to OS fixes and general quality refinements that Microsoft intends to roll into the upcoming mandatory Patch Tuesday update cycle. Understanding the contents and install path for this preview package helps you decide whether to install it today or wait for next month's automatic maintenance updates.
Highlights
- OS Build 26200.8328 update: Elevates systems running Windows 11 version 25H2 to build revision 26200.8328 upon successful installation.
- OS Build 26100.8328 update: Updates systems running Windows 11 version 24H2 to build revision 26100.8328.
- April 30, 2026 release date: Serves as Microsoft's non-security preview update package released at the end of April 2026.
- Dual version architecture targeting: Applies unified system changes across both Windows 11 version 25H2 and Windows 11 version 24H2 release branches.
- Optional quality preview release: Provides non-security operating system fixes and background refinements ahead of the next mandatory Patch Tuesday update cycle.
Known issues
Microsoft reports no known issues for this update.
Should you install it?
KB5083631 is completely optional because it is categorized as a non-security preview update. Windows Update will not download or install this update on your computer automatically unless you deliberately check for updates and choose to install optional releases. Microsoft uses preview builds like this one to allow system administrators and enthusiasts to test non-security quality improvements early.
If your computer is currently operating normally without any critical issues, you can safely ignore KB5083631. Skipping this preview release allows your device to stay on its current build until the same fixes are bundled into the next mandatory Patch Tuesday update. However, if you prefer to maintain your system on the newest build number (build 26200.8328 or 26100.8328) or need early access to preview fixes, downloading the update is safe and straightforward.
How to get it
Illustration: the Troubleshoot > Other troubleshooters page under Settings > System
You can obtain KB5083631 through the Windows Update menu in Settings or by downloading the standalone installer directly from the Microsoft Update Catalog.
Method 1: Windows Update
- Open the Start menu and select Settings (or press the Windows key + I shortcut).
- Select Windows Update from the left navigation column.
- Turn on the toggle switch next to Get the latest updates as soon as they're available if you want optional preview updates listed immediately.
- Click the Check for updates button.
- When KB5083631 appears as an optional preview update (referencing OS Build 26200.8328 or 26100.8328), click Download and install.
- Wait for the update files to finish downloading and installing.
- Click Restart now when prompted to reboot your PC and finalize the installation.
Method 2: Microsoft Update Catalog
If Windows Update experiences download problems or fails to apply the patch, you can install KB5083631 manually:
- Launch your web browser and navigate to the Microsoft Update Catalog website.
- In the search box, enter KB5083631 and click Search.
- Identify the installer package corresponding to your operating system version (Windows 11 version 25H2 or Windows 11 version 24H2) and processor architecture (x64 or ARM64).
- Click the Download button beside the correct entry.
- In the pop-up window, click the link ending in
.msuto save the standalone package to your device. - Locate the downloaded file on your computer and double-click it to run the Windows Update Standalone Installer.
- Follow the prompts on your screen and restart your PC once the installation process finishes.
If you run into issues during installation, such as the update stalling or returning an error message, run the built-in Windows Update troubleshooter in Settings under System > Troubleshoot > Other troubleshooters, confirm that your system drive has sufficient free storage space, and restart your computer before attempting the installation again.
Sources
Frequently asked questions
Is KB5083631 an automatic Windows 11 update?
No, KB5083631 is an optional preview update released on April 30, 2026. Your PC will not install it automatically unless you manually initiate the process in Windows Update.
What build numbers are delivered by KB5083631?
Installing KB5083631 updates Windows 11 version 25H2 to OS Build 26200.8328 and Windows 11 version 24H2 to OS Build 26100.8328.
Are there any known bugs in update KB5083631?
Microsoft reports no known issues for update KB5083631 at this time.
How can I download KB5083631 for offline installation?
You can search for KB5083631 on the Microsoft Update Catalog website, download the matching .msu file for your Windows 11 architecture, and run it manually.
Checked against Microsoft's release notes on ; re-checked when a new build ships.
Covers Windows 11 update releases and the problems that follow them. Tracks Microsoft's release-health notes daily and flags known issues the same day they appear.
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