Microsoft’s Windows 11 25H2 is now rolling out broadly, and if you’re still on 24H2 or an earlier build, this guide covers everything you need to know before you hit that update button. From new features and hardware requirements to known bugs and the fastest upgrade paths, this is a complete reference for anyone looking to upgrade to Windows 11 25H2 without surprises.
Quick takeaway: If you’re already running Windows 11 24H2 on supported hardware, upgrading to 25H2 is usually fast and requires only a single restart thanks to Microsoft’s enablement package approach.
What Is Windows 11 25H2 and Why Does It Matter?
Windows 11 25H2 is Microsoft’s annual feature update for 2025-2026, delivered via an enablement package for eligible 24H2 devices and bringing Wi-Fi 7 enterprise support, removable Store apps, and cumulative security improvements.
Unlike the larger architectural shift that came with 24H2, version 25H2 shares the same core codebase as its predecessor. That means eligible devices running 24H2 can upgrade through a lightweight enablement package rather than a full OS reinstall, making the process significantly faster and less disruptive. According to KB5054156 on Microsoft Support, the enablement package upgrade typically requires only a single restart, compared to the multi-phase process of a full feature update.
The OS build number for 25H2 is 26200.x, while 24H2 sits on 26100.x. Both branches receive the same cumulative updates simultaneously, as confirmed by the May 12, 2026 KB5089549 update (OS Builds 26200.8457 and 26100.8457), which patched both versions in the same release.
Windows 11 25H2 New Features in 2026
Windows 11 25H2 introduces enterprise-grade Wi-Fi 7 support, the ability to uninstall previously locked Store apps, and a range of under-the-hood security and reliability improvements.
Wi-Fi 7 Enterprise Support
One of the headline additions in 25H2 is native Wi-Fi 7 (802.11be) enterprise support. This allows IT administrators to manage Wi-Fi 7 connections through Group Policy and Mobile Device Management (MDM) tools, enabling the multi-link operation (MLO) and 320 MHz channel capabilities that Wi-Fi 7 hardware supports. For home users with a compatible router and adapter, this also means the OS can now take fuller advantage of those speeds without third-party driver workarounds.
Removable Store Apps
Microsoft has expanded the list of inbox apps that users can now fully uninstall through the Microsoft Store. Previously, several apps bundled with Windows 11 could be “reset” or disabled but not removed cleanly. The 25H2 update formalizes removal support for a broader set of these apps, giving users and IT administrators more control over the default application footprint.
Security and BitLocker Improvements
The May 2026 cumulative update KB5089549 also addressed a BitLocker recovery screen issue that was triggering incorrectly on some devices after routine updates. The fix is included in the 26200.8457 build and is applied automatically through Windows Update.
Windows 11 24H2 End of Support 2026: Should You Upgrade?
Windows 11 24H2 remains supported in 2026, but staying on top of feature updates ensures you receive the latest security baselines and are not caught unprepared when Microsoft announces an end-of-service date for that branch.
Microsoft has officially confirmed that Windows 11 24H2 Home and Pro editions will reach end of support on October 13, 2026. Enterprise and Education editions receive extended support beyond that date.
Upgrading to Windows 11 25H2 ensures your device remains on Microsoft’s latest supported feature update branch with ongoing security and stability updates through 2027.
According to Microsoft’s Windows Lifecycle Policy, Home and Pro editions of Windows 11 receive 24 months of support from the release date of each feature update, making timely upgrades an important part of maintaining a secure system.
Windows 11 25H2 Known Issues and KB5089549 Install Issues Fix
As of May 2026, the most actively tracked known issue in Windows 11 25H2 involves a Secure Boot certificate expiration warning, while previously resolved issues include Samsung drive access denial and Microsoft account sign-in failures.
Known Issue: KB5089549 Installation Failure (0x800f0922)
As of May 2026, Microsoft’s Windows release health dashboard lists an active issue where the KB5089549 security update may fail to install with error code 0x800f0922 on some devices.
The issue is typically linked to insufficient free space in the EFI System Partition (ESP), which Windows uses during security and boot-related updates.
Warning: Microsoft has acknowledged the issue but has not released a permanent fix as of May 2026.
Most home users will not encounter the problem, but advanced users and IT administrators should verify EFI partition health before deploying updates at scale.
Secure Boot Certificate Warnings
Microsoft has also issued guidance regarding Secure Boot certificate expiration preparation for some Windows environments in 2026.
Users should avoid disabling Secure Boot unless Microsoft explicitly recommends it for a specific troubleshooting scenario.
Resolved: Samsung C Drive Access Denial
An earlier bug caused certain Samsung NVMe drives to trigger access denial errors on the C: partition after upgrading. This issue has been resolved and is documented on the resolved issues page for Windows 11 25H2. If you were holding off on upgrading due to this issue and use a Samsung SSD as your primary drive, the fix is confirmed included in current builds.
Resolved: Microsoft Account Sign-In Failures
A post-March 2026 cumulative update introduced sign-in failures for some Microsoft account users. This was also resolved in a subsequent patch and is listed on the same resolved issues page. Users who experienced this issue and applied workarounds should verify their account linking is functioning correctly after updating.
Windows 11 25H2 vs. 24H2: Key Differences at a Glance
| Feature / Attribute | Windows 11 24H2 | Windows 11 25H2 |
|---|---|---|
| OS Build Number | 26100.x | 26200.x |
| Upgrade Method (from 24H2) | N/A (base version) | Enablement package (single restart) |
| Wi-Fi 7 Enterprise Support | Partial (driver-level only) | Full native MDM/Group Policy support |
| Removable Store Apps | Limited set | Expanded set |
| Latest Cumulative Update (May 2026) | KB5089549 (26100.8457) | KB5089549 (26200.8457) |
| Shared Codebase with 24H2 | N/A | Yes |
| Estimated Support End | October 13, 2026 (Home/Pro) | October 12, 2027 (Home/Pro) |
How to Upgrade to Windows 11 25H2: Step-by-Step Instructions
Most users running Windows 11 24H2 on supported hardware can upgrade to 25H2 directly through Windows Update, while a manual enablement package is available for IT administrators or users who need faster access.
Before You Upgrade to Windows 11 25H2
Before starting the upgrade process, take a few minutes to prepare your system properly.
Important: If BitLocker is enabled on your device, make sure you locate and back up your BitLocker recovery key before installing Windows 11 25H2.
Checklist before upgrading:
- Verify your device meets Windows 11 hardware requirements (TPM 2.0, Secure Boot capable UEFI, 64 GB storage minimum, 4 GB RAM).
- Back up important files to an external drive or cloud storage.
- Save your BitLocker recovery key if device encryption is enabled.
- Check the Windows 11 25H2 known issues dashboard for safeguard holds affecting your hardware.
- Make sure your laptop is plugged into power during installation.
- Ensure you have a stable internet connection before starting the update.
Method 1: Windows Update (Recommended for Most Users)
Open Settings and navigate to Windows Update. Click Check for updates. If your device is eligible and Microsoft has lifted any safeguard holds for your hardware configuration, the 25H2 feature update will appear as an optional or recommended update. Select it, download, and allow the single-restart process to complete. The full update history is available at the Windows 11 version 25H2 update history page on Microsoft Support.
Method 2: Enablement Package via KB5054156
For IT administrators or users who want to initiate the upgrade manually without waiting for Windows Update rollout, Microsoft provides the enablement package documented in KB5054156. Prerequisites include being on a fully updated Windows 11 24H2 installation. The package activates the 25H2 feature set without replacing OS files, which is why the process is faster than a traditional upgrade and requires only one restart.
Method 3: Clean Install via ISO
If your device is experiencing instability or you prefer a fresh start, Microsoft makes 25H2 ISO images available through the official Microsoft Software Download page. Boot from the ISO, choose “Custom” installation, and format your target drive. Back up all data before proceeding. After installation, use Windows Update to apply KB5089549 and all subsequent patches.
Should You Upgrade to Windows 11 25H2 Right Away?
For most home users, upgrading to Windows 11 25H2 is relatively low-risk because the update shares the same core platform as Windows 11 24H2 and installs through a lightweight enablement package.
However, IT administrators and enterprise environments may still prefer waiting 30 to 60 days before broad deployment in order to validate driver, firmware, and application compatibility across managed systems.
Disclaimer
Technology features, update availability, and system requirements may change over time. Always verify critical information through official Microsoft documentation and release health pages before installing major Windows updates.
Frequently Asked Questions
Yes, provided your hardware meets Windows 11 requirements including TPM 2.0, Secure Boot, and a supported processor. Depending on Microsoft’s rollout and installation media, eligible devices may upgrade directly to the latest supported Windows 11 feature update.
KB5089549 is the May 12, 2026 cumulative security update for both Windows 11 25H2 (build 26200.8457) and 24H2 (build 26100.8457). It includes security fixes, a BitLocker recovery screen correction, and SSDP reliability improvements. For most users, it installs automatically through Windows Update. If your device has not received it, you can check for updates manually in Settings or visit the Microsoft Update Catalog.
Yes. Microsoft has officially confirmed that Windows 11 24H2 Home and Pro editions will reach end of support on October 13, 2026. Enterprise and Education editions continue receiving support beyond that date based on Microsoft’s lifecycle policy.
Users who want to remain on the latest supported consumer branch should plan to upgrade to Windows 11 25H2 before the 24H2 support deadline.
As of May 2026, Microsoft acknowledges this as a known issue introduced by KB5089549 and is actively investigating a fix. The warning does not currently indicate an active security failure on most affected devices. Check the Windows 11 25H2 release health dashboard at learn.microsoft.com for the latest resolution status. Avoid disabling Secure Boot as a workaround without explicit guidance from Microsoft, as this would reduce your system’s security posture.
