Microsoft released cumulative update KB5077181 for Windows 11 version 25H2 (2025 update) as part of the February 2026 Patch Tuesday. The cumulative package KB5065426 (builds 26200.7840 and 26100.7840) is intended for Windows 11 version 25H2 on x64 (amd64) and ARM64 processors.
Windows 11 version 25H2 is not a new operating system, but a small feature update (an enablement package) that activates existing but previously unused capabilities. Simply put, if you have Windows 11 24H2 installed with the latest updates, moving to version 25H2 only requires downloading and installing the activation package KB5054156 (eKB) and restarting your computer. Most of the changes are already downloaded and waiting for activation, so the installation happens as quickly as a regular monthly update, and after completion you will get all the new features that were previously inactive on your system.
- Gaming. Fixed an issue where device compatibility with full-screen gaming mode was incorrectly determined.
- Networking. Addressed an error that prevented some devices from connecting to certain Wi-Fi networks protected by WPA3-Personal. This problem could occur after installing update KB5074105.
- Secure Boot. Microsoft is updating the certificates used to verify trusted components during Windows startup. To avoid situations where some PCs may experience startup problems after the update, deployment will be gradual and limited to devices with a confirmed history of stable update installations.
Cumulative update 5077181 for PCs is installed automatically through Windows Update. To check this, go to Settings > Windows Update and click Check for updates.
A system restart is required to complete the installation. After the update, the Windows 11 build number will change to 26200.7840 or 26100.7840.
| Feature / Change | Performance Impact | Optimization | PC Speed Impact | Gaming Optimization |
|---|---|---|---|---|
| Fixed incorrect determination of device compatibility with full-screen gaming mode | 🟢 Improved (+5–15% FPS stability in full-screen) | 🟢 High — correct detection prevents unnecessary mode switching | 🟡 Minor positive — reduces background interruptions | 🟢 High — smoother full-screen experience, fewer stutters |
| Fixed WPA3-Personal Wi-Fi connection error after KB5074105 | ⚪ No direct impact | 🟡 Medium — restores network reliability | 🟢 Improved — eliminates failed connections and retry delays | 🟡 Low — prevents latency spikes from Wi-Fi drops |
| Secure Boot certificate update (gradual rollout) | 🟡 Neutral to slightly positive — trusted boot remains efficient | 🟢 High — ensures long-term compatibility and security | ⚪ No measurable change | ⚪ No impact |
The last 10 Windows updates:
| Update | Build | Version | Windows | Channel | Date |
|---|---|---|---|---|---|
| KB5127757 | 28120.3181 | 26H1 | Windows 11 | Experimental | 2026-10-07 |
| KB5127758 | 26220.9606 | 25H2 | Windows 11 | Beta | 2026-10-07 |
| KB5127754 | 28020.3172 | 26H1 | Windows 11 | Beta | 2026-10-07 |
| KB5127753 | 26340.9616 | 26H2 | Windows 11 | Experimental | 2026-10-07 |
| KB5124192 | 28120.3151 | 26H1 | Windows 11 | Experimental | 2026-10-02 |
| KB5124196 | 28020.3142 | 26H1 | Windows 11 | Beta | 2026-10-02 |
| KB5124197 | 26220.9587 | 25H2 | Windows 11 | Beta | 2026-10-02 |
| KB5124193 | 26340.9596 | 26H2 | Windows 11 | Experimental | 2026-10-02 |
| KB5124166 | 26220.9568 | 25H2 | Windows 11 | Beta | 2026-09-25 |
| KB5124163 | 28020.3112 | 26H1 | Windows 11 | Beta | 2026-09-25 |