What's new in KB5093998 (Windows 11 build 22631.7219)
- Windows 11, version 23H2
- OS Build 22631.7219
Maya Reyes4 min readQuick answer
KB5093998 is a mandatory cumulative security update released on June 9, 2026, for devices running Windows 11, version 23H2. It updates the operating system to OS Build 22631.7219 and includes critical security patches, core maintenance fixes, and servicing stack enhancements. You can install it automatically via Windows Update or download it manually from the Microsoft Update Catalog.
Microsoft released KB5093998 on June 9, 2026, as part of its monthly Patch Tuesday distribution for devices running Windows 11, version 23H2. Installing this cumulative update advances your system version to OS Build 22631.7219. Because this is a mandatory security update rather than an optional preview release, Windows Update will automatically download and install it on affected devices unless updates are explicitly paused in your system settings.
This security update delivers crucial patches, core operating system fixes, and background stability maintenance. For general Windows 11 users, applying this update ensures that your device stays protected against security vulnerabilities identified since previous updates in this servicing branch. KB5093998 supersedes older cumulative updates for version 23H2, including KB5087420 (OS Build 22631.7079) released in May 2026 and KB5082052 (OS Build 22631.6936) released in April 2026.
To verify whether your PC has already installed this update, you can check your current operating system build number. Open the Start menu, type winver, and press Enter. A small dialog box will appear displaying your current Windows 11 version and OS build. If the build number reads 22631.7219, KB5093998 is already active on your machine. If it displays an earlier build number, such as 22631.7079 or 22631.6936, your device is ready to receive this release.
Understanding the role of cumulative updates helps keep your system running smoothly. Cumulative updates aggregate all previously released security patches and quality improvements into a single package. This means that even if your system missed prior updates from earlier months, installing KB5093998 brings your device completely up to date with all cumulative fixes released up to June 9, 2026.
Highlights
- OS Build update to 22631.7219: Advances systems running Windows 11, version 23H2 from previous builds to OS Build 22631.7219.
- June 9, 2026 security release: Delivers the official monthly Patch Tuesday security updates for Windows 11, version 23H2 devices.
- Servicing stack maintenance: Includes updated servicing stack components that improve the reliability of the update installation process.
- Supersedes KB5087420: Replaces May 12, 2026's KB5087420 (OS Build 22631.7079) and earlier cumulative releases on the 23H2 update path.
- Establishes baseline for future builds: Sets the underlying code baseline ahead of subsequent releases in the branch, such as KB5099414 (OS Build 22631.7376) and KB5120240 (OS Build 22631.7517).
Known issues
Microsoft reports no known issues for this update.
Should you install it?
Because KB5093998 is a mandatory monthly security update released on June 9, 2026, all users running Windows 11, version 23H2 should install it promptly. Unlike optional non-security preview updates released toward the end of the month, Patch Tuesday releases provide critical security patches and underlying OS maintenance required to keep your computer safe from known security threats.
If your PC is configured with default update settings, Windows Update will automatically download the package and prompt you to schedule a restart. For users running critical software or enterprise workloads, it is good practice to save your work and close active applications before restarting. If you encounter any installation delays, running the Windows Update troubleshooter or downloading the standalone package can help complete the process successfully.
How to get it
Illustration: the Troubleshoot > Other troubleshooters page under Settings > System
You can obtain KB5093998 through Windows Update or by manually downloading the standalone installer file from the Microsoft Update Catalog.
Method 1: Windows Update
- Open the Start menu and select Settings, or press the Windows key + I shortcut on your keyboard.
- Click on Windows Update from the left-hand navigation sidebar.
- Select the Check for updates button located at the top right of the window.
- Wait for Windows Update to complete its scan. When KB5093998 appears in the update list, click Download & install.
- Allow the download and installation progress bar to complete.
- Select Restart now when prompted to reboot your computer and apply OS Build 22631.7219.
Method 2: Microsoft Update Catalog
- Launch your preferred web browser and go to the official Microsoft Update Catalog site.
- Type KB5093998 into the search bar near the top right corner and press Enter.
- Locate the correct download package matching your computer's system architecture (such as x64 or ARM64) for Windows 11, version 23H2.
- Click the Download button situated on the right side of the chosen package row.
- In the pop-up window that appears, click the direct download link to save the
.msufile to your PC. - Open your system Downloads folder and double-click the downloaded
.msufile to launch the standalone installer. - Follow the on-screen installation prompts, and restart your computer when prompted to finalize the update to build 22631.7219.
What to do if the update fails to install
If KB5093998 gets stuck during the download process or fails to install through Windows Update, you can try standard Windows troubleshooting steps:
- Run the Windows Update troubleshooter: Go to Settings > System > Troubleshoot > Other troubleshooters, and run the Windows Update troubleshooter to automatically detect and repair underlying update service issues.
- Restart update services: Rebooting your computer can clear temporary cache locks that occasionally stall the Windows Update background process.
- Use the standalone installer: If Windows Update continues to encounter errors, download the
.msufile directly from the Microsoft Update Catalog as detailed above, which bypasses the Windows Update online mechanism.
Sources
Frequently asked questions
What is KB5093998?
KB5093998 is a cumulative security update released on June 9, 2026, for Windows 11, version 23H2. It updates the operating system build number to OS Build 22631.7219.
Is KB5093998 an optional preview or automatic update?
KB5093998 is a mandatory security update associated with Patch Tuesday. Windows Update will automatically download and install it unless updates are paused.
Does KB5093998 have any known issues?
Microsoft reports no known issues for KB5093998 at this time.
How do I check if KB5093998 is installed on Windows 11?
Press the Windows key + R, type winver, and press Enter. If your system displays OS Build 22631.7219 under Windows 11 version 23H2, KB5093998 is installed.
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.
More from Maya Reyes