KB5077181 is a cumulative update released for Windows 11 on February 10, 2026. This article looks back at the supported versions, key changes, and known issues listed by Microsoft.
This is a reference article about the February 2026 update. If you are updating your PC now, check the updates currently offered through Windows Update instead of searching for this older KB number to install separately.
Supported Windows 11 Versions and OS Builds
KB5077181 applies to Windows 11 versions 24H2 and 25H2. After installation, the OS builds are:
- Windows 11 24H2: 26100.7840
- Windows 11 25H2: 26200.7840
To check your Windows version and OS build, open Settings → System → About.
What Did KB5077181 Change?
KB5077181 includes security fixes and quality improvements from earlier updates. Among the changes highlighted by Microsoft are:
- A fix for an issue that prevented some devices from connecting to certain WPA3-Personal Wi-Fi networks
- A fix related to determining device eligibility for the full-screen gaming experience
- Improved targeting information to help eligible devices receive new Secure Boot certificates in stages
Microsoft also lists updates to AI components in this release. Those components apply to Copilot+ PCs; the listing does not mean that every Windows 11 PC receives new AI features.
Are There Any Known Issues?
On its KB5077181 support page, Microsoft says it is not currently aware of any issues with this update. This does not rule out an installation error or a problem on an individual PC. If you notice a problem, record any error code and check when the symptom first appeared before assuming this update caused it.
What If a Windows Update Fails?
Start by restarting your PC. Then check your available storage space and internet connection before opening Windows Update again. If the update remains stuck or shows an error code, use the specific error message to guide further troubleshooting.
Microsoft also provides KB5077181 through the Microsoft Update Catalog. However, its official instructions describe additional package requirements and installation order. Downloading one .msu file and running it may not be the complete procedure. If manual installation is necessary, follow the current instructions on Microsoft’s support page for this KB.
Final Thoughts
KB5077181 was the February 2026 cumulative update for Windows 11 versions 24H2 and 25H2. It included security fixes, selected quality improvements, and changes related to Secure Boot certificate delivery. Microsoft’s support page does not currently list a known issue for this update.
If you are updating Windows today, check Settings → Windows Update for the updates offered to your PC. Use this article to identify and understand KB5077181 if you see it in your update history.
