Windows 10 users enrolled in Microsoft’s Extended Security Updates (ESU) program are now receiving the June 2026 cumulative update KB5094127. Released as part of Microsoft’s June 2026 Patch Tuesday rollout, this update advances Windows 10 to Build 19045.7417 for version 22H2 and Build 19044.7417 for version 21H2.
Although Windows 10 officially reached end of support in October 2025, Microsoft continues to provide security updates and selected quality improvements through the ESU program. KB5094127 primarily focuses on security enhancements, Secure Boot certificate updates, and several usability improvements.
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Windows 10 KB5094127 at a Glance
| Update | KB5094127 |
|---|---|
| Release Date | June 9, 2026 |
| OS Build | 19045.7417 (22H2), 19044.7417 (21H2) |
| Update Type | Cumulative Security Update |
| Available For | Windows 10 22H2 and 21H2 (ESU) |
| Release Channel | Patch Tuesday |
What’s New in Windows 10 KB5094127?
While this update doesn’t introduce major new features, it includes several important improvements to maintain system security and reliability.
1. Secure Boot Certificate Rollout Continues
One of the most significant changes in KB5094127 is Microsoft’s ongoing deployment of updated Secure Boot certificates.
The original Secure Boot certificates that have been used since 2011 are approaching expiration. Microsoft is gradually replacing them with newer certificates to ensure Windows devices continue to boot securely after the older certificates expire. KB5094127 expands support for this certificate rollout and adds functionality to help monitor deployment status.
This change is particularly important for organizations and advanced users who rely on Secure Boot for system protection.
2. Improved File Explorer Search
Microsoft has enhanced File Explorer search functionality in this release.
According to reports, the update improves support for:
- Chinese-language text searches
- UTF-8 encoded files without a Byte Order Mark (BOM)
- Search result consistency
- Content view accuracy
- Tooltip text presentation
These refinements help File Explorer return more accurate search results, particularly in multilingual environments and when working with modern text-based files.
3. June 2026 Security Fixes
As part of Microsoft’s June 2026 Patch Tuesday release, KB5094127 delivers an extensive set of security updates designed to protect Windows 10 systems from newly discovered threats. According to Microsoft, this month’s security rollout addresses approximately 200 vulnerabilities across Windows, Microsoft Office, Edge, .NET, and other Microsoft products.
Among the most significant fixes are patches for several publicly disclosed zero-day vulnerabilities that attackers could potentially exploit before organizations have a chance to update their systems. Notable fixes include:
- CVE-2026-0234 – A Windows Kernel privilege escalation vulnerability that could allow an attacker with limited access to gain elevated system privileges.
- CVE-2026-0235 – A Remote Desktop Services remote code execution vulnerability that could enable attackers to execute malicious code on vulnerable systems under certain conditions.
In addition to these high-profile fixes, the update resolves numerous vulnerabilities affecting core Windows components, helping strengthen system security, improve platform stability, and reduce the risk of malware infections, ransomware attacks, and unauthorized access.
Because several of the addressed vulnerabilities are rated Critical and some were publicly disclosed before patches became available, Microsoft strongly recommends installing KB5094127 as soon as possible to keep Windows 10 devices protected against the latest security threats.
Additionally, KB5094123 (OS Build 17763.8880) was released for Windows 10 version 1809. Both updates contain miscellaneous security fixes and general improvements to enhance overall system reliability and user experience.
However, if your PC isn’t compatible with the newer OS (Windows 11), you can enroll in the Windows 10 Extended Security Updates (ESU) program, which provides critical patches for one more year at no cost (until October 2026).
Known Issues
At the time of writing, Microsoft has not reported any widespread new issues specifically introduced by KB5094127. Users should continue to monitor Microsoft’s release health dashboard for any emerging problems after installation.
How to install Windows 10 KB5078752
The update is now rolling out via Windows Update, and users can manually check for it by navigating to Settings > Windows Update.
2026-06 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems (KB5094127)
Ensure your device is connected to a stable internet connection to download update files from the Microsoft server. Once done, reboot your computer to apply the changes.
Alternatively, you can download the standalone installer directly from the Microsoft Update Catalog by searching for “KB5094127.”
Windows 10 KB5094127 Direct download links 64-bit and 32-bit (x86).
- Locate the patch next to the correct edition and version of the operating system.
- To install the update, simply run the downloaded MSU file and Windows will automatically install the cumulative update.
- If you are looking for the latest Windows 10 version 22H2 ISO, click here.
- In addition, you can download the latest Windows 11 ISO images here.
How to Uninstall Windows 10 KB5094127
If installing KB5094127 causes issues on your device, you can uninstall the update to revert the changes.
Uninstall KB5094127 using the Windows Update History tool
- Go to Windows Settings (Windows key + I) > Update & Security > Windows Update.
- From the right-hand pane, click on View Update History.
- Now, click on Uninstall updates.
- Select Update for Microsoft Windows (KB5094127) and press the Uninstall button.
Uninstall KB5094127 using the command line
Another quick way to uninstall this update is by using the command prompt. Here are the commands:
- Open the Command Prompt (Run > cmd)
- Run the following command:
wmic qfe list brief /format:table - This will show all the updates installed on the computer. Make sure KB5094127 is on the list.
- To uninstall the update, run the following command
wusa /uninstall /kb:5094127
The system needs to be restarted after uninstalling the update.
In addition, Microsoft has noted that Windows 10 version 21H2 reached end of service, meaning devices no longer receive monthly security and quality updates that protect against the latest security threats. Microsoft recommends installing the latest version 22H2 or Upgrade to Windows 11
How to Fix Common Issues with Windows 10 KB5094127
While the Windows 10 KB5094127 update brings significant improvements and fixes, some users may experience problems during or after installation. Here are proven solutions to resolve the most common issues.
Run the Windows Update Troubleshooter
The built-in troubleshooter can automatically detect and fix update-related issues.
- Press Windows + I to open Settings.
- Go to Update & Security > Troubleshoot.
- Click Additional troubleshooters.
- Select Windows Update and click Run the troubleshooter.
- Follow the on-screen instructions and apply any recommended fixes.
Check Your Internet Connection
A weak or unstable internet connection can cause the update to fail or get stuck.
- Use a wired Ethernet connection instead of Wi-Fi for better stability.
- Restart your router or modem.
- Temporarily disable VPNs or proxy servers.
- Test your connection speed using a service like Speedtest
Clear the Windows Update Cache
Corrupted update files in the cache can cause installation failures.
- Press Windows + R, type services.msc, and press Enter.
- Right-click the Windows Update service and select Stop.
- Navigate to C:\Windows\SoftwareDistribution\Download and delete all files inside the folder.
- Go back to Services, right-click Windows Update, and choose Start.
- Try installing the update again from Settings > Update & Security > Windows Update.
Repair Corrupt System Files
Damaged or missing system files can lead to update errors. Running SFC and DISM can help.
Open Command Prompt as administrator and run the following commands:
- sfc /scannow
- DISM /Online /Cleanup-Image /RestoreHealth
This will scan for corrupt system files and the Windows image for corruption and try to repair them. Let the scan complete 100%. Once it’s done, restart your PC and try installing the update again.
Check for Driver and Software Conflicts
Outdated or incompatible drivers can cause post-update issues like crashes or slow performance.
- Open Device Manager (Windows + X > Device Manager).
- Look for devices with a yellow warning icon and update their drivers.
- Update critical drivers (graphics, network, chipset) from the manufacturer’s website.
Windows 10 KB5094127– Frequently Asked Questions
Eligible systems include Windows 10 devices on version 22H2 that enroll in the ESU program. In certain regions, free enrolment options exist, in others, commercial options apply.
If you skip or fail to install the update and are enrolled in ESU, you may miss out on the first round of patched vulnerabilities. Even if you are not enrolled, your system now resides outside standard update support, exposing it to risk.
Yes, generally via the standard Windows Update channel for eligible systems. It may also be available via Microsoft Update Catalog for manual download.
Microsoft has not committed to an open-ended ESU timeline for Windows 10. It is a transitional program.
The original Secure Boot certificates issued in 2011 are approaching expiration. Microsoft is replacing them with newer certificates to ensure systems continue booting securely in the future.
Also read:
- Difference Between Windows 10 Feature Updates and Cumulative Updates
- Windows Update won’t download or fails to install on Windows 10 (Solved)
- How to Share Files and Printers Between Two Windows 10 Computers
- Windows 10 keeps shutting down and restarting automatically. Try these solutions
- Complete Review of Microsoft Windows 10 Operating System
