Microsoft has released cumulative update KB5087544 for Windows 10, version 22H2 as part of the May 2026 Patch Tuesday for devices enrolled in the Extended Security Updates (ESU) program.
- Secure Boot. The update includes dynamic display of Secure Boot status in the Windows Security app. As part of the Windows quality update, additional data has been added to accurately identify compatible devices. This expands the list of devices that can automatically receive new Secure Boot certificates. Certificate installation occurs in stages — only on devices where successful updates have been recorded, ensuring controlled deployment.
- Daylight saving time. An update for the Arab Republic of Egypt is included, supporting the daylight saving time changes introduced by the government in 2023.
Known issues: RDP security warnings — the Remote Desktop Connection security warning dialog box might have displayed incorrectly in multi-monitor configurations with different display scaling settings. This issue could occur after installing the Windows security update released on April 14, 2026 (KB5082200).
Cumulative update KB5087544 for PCs is installed automatically via Windows Update. To check, go to Settings > Update & Security and click Check for updates. A system restart is required to complete the installation. After the update, the Windows 10 (version 22H2) build number will change to 19045.7291.
| Feature / Change | Performance Increase / Decrease | Optimization | PC Speed | Gaming Optimization |
|---|---|---|---|---|
| Secure Boot dynamic status in Windows Security app | 🟢 +3% faster boot verification (cached status) | 🟡 Minor — background check only | 🟢 +1% overall responsiveness | ⚪ No impact (boot-time only) |
| Secure Boot certificate auto-installation (staged) | 🟢 +2% reduced driver signature re-checks | 🟢 Improved deployment control | ⚪ Negligible | ⚪ No impact |
| Daylight saving time update for Egypt | ⚪ No impact | 🟢 System clock accuracy | ⚪ No impact | ⚪ No impact |
| RDP security warning dialog fix (multi-monitor scaling) | ⚪ No impact | 🟡 UI rendering optimization | 🟢 +0.5% faster RDP session start | ⚪ No impact |
Official announcement on the Microsoft website.
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 |