- Windows 11 build 28000.1836 (KB5083768) arrives as the second cumulative update version 26H1.
- This release includes fixes, improvements, and changes for specific computers.
- Windows 11 26H1 will be exclusively availble on new devices with specific processors, and not for existing PCs.
Microsoft has made available the Windows 11 build 28000.1836 (KB5083768) as the March 2026 update for devices running version 26H1.
According to the changelog, the “2026-04 Security Update (KB5083768) (28000.1836)” includes only several fixes and improvements related to Secure Boot, networking, and Remote Desktop.
It’s worth noting that Windows 11 26H1 is not a version for current devices. Microsoft has explicitly stated that version 26H1 is not an upgrade path for Windows 11 25H2 or earlier releases.
According to the company’s newly published Microsoft Health Dashboard page, version 26H1 is a hardware-optimized release designed to enable next-generation silicon developed in partnership with device manufacturers and silicon partners. This release will be available exclusively as a preinstalled experience on select new devices beginning in early 2026, with capabilities tailored specifically for those platforms.
Microsoft is referring to the new ARM64 PCs, starting with devices powered by the Snapdragon X2 Plus, Elite, and Extreme processors. If you own a computer running on Intel or AMD hardware, Windows 11 26H1 will never be offered to your system.
- What’s new on Windows 11 25H2 and 24H2 update KB5083768
- Windows 11 March 2026 Patch Tuesday – Manual installation process
- Windows 11 March 2026 Patch Tuesday – Update history
What’s new on Windows 11 26H1 update KB5083768
Microsoft is currently rolling out these improvements and fixes as part of the April 2026 Security Update for Windows 11 26H1.
- Networking: Improved reliability for SMB compression over QUIC, ensuring compression requests complete more consistently, reducing timeouts, and delivering smoother, more dependable performance.
- Remote Desktop: Enhanced protection against phishing attacks using “.rdp” files by showing all requested connection settings (off by default) before connecting, plus a one‑time security warning the first time an “.rdp” file is opened on a device.
As part of this release, the software giant is rolling out an enhancement that lets some devices display their Secure Boot update status directly in the Windows Security app, complete with badges and notifications that make it easier to understand what’s happening behind the scenes.
Microsoft is also improving how the operating system decides which devices are ready for new Secure Boot certificates. Quality updates now include more accurate targeting data, helping ensure that only devices with a strong track record of successful updates receive the certificates automatically. You can also apply the Secure Boot certificates manually with these instructions.
Also, this update fixes an issue in which some devices could unexpectedly enter BitLocker Recovery after receiving Secure Boot updates.
Windows 11 April 2026 Patch Tuesday – Manual installation process
Since there’s always a chance of problems during and after applying a quality update, it’s recommended to prepare your computer by creating a restore point and a full backup before proceeding with the installation.
To download and install this Windows 11 update, open the “Windows Update” settings and click the “Check for Updates” button.
If your computer has issues after installing this package, follow these instructions to uninstall the April 2026 update. If you’re unable to uninstall the update, follow these steps to recover your device.
The update will download and install automatically. However, you can also apply it manually by downloading the update KB5083768 from the Update Catalog website.
Windows 11 March 2026 Patch Tuesday – Update history
- Final Release – Patch Tuesday (Stable Channel):
- Windows 11 26H1 build 28000.1836 release date: April 14, 2026. Official notes.
Mauro Huculak is a Windows How-To Expert and founder of Pureinfotech in 2010. With over 22 years as a technology writer and IT Specialist, Mauro specializes in Windows, software, and cross-platform systems such as Linux, Android, and macOS.
Certifications: Microsoft Certified Solutions Associate (MCSA), Cisco Certified Network Professional (CCNP), VMware Certified Professional (VCP), and CompTIA A+ and Network+.
Mauro is a recognized Microsoft MVP and has also been a long-time contributor to Windows Central.
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