Microsoft has released cumulative security update KB5083768 (Build 28000.1836) for Windows 11, version 26H1 as part of the April 2026 Patch Tuesday for PCs with ARM processors. Windows 11, version 26H1 received the KB5083768 security update for April 2026 for PCs with ARM64 architecture processors (Snapdragon). Additionally, the update is available for devices with x64 architecture processors (x86-64, Intel and AMD) that have been updated to version 26H1 using official ISO images.
- Emoji 16.0. Added support for Emoji 16.0.
- Windows Backup. Expanded recovery capabilities via Windows Backup, including automatic restoration of settings and applications upon first login.
- Quick system recovery. Improved the Quick system recovery feature — it now automatically enables on some devices and performs system checks.
- Visual interface improvements and network speed test. Introduced visual interface improvements and a new built-in network speed test via the taskbar.
- Secure Boot. The Windows Security app (Settings > Privacy & security > Windows Security) may now display the status of Secure Boot certificate updates. The system shows notifications and status icons. On commercial devices, this feature is disabled by default. As part of the Windows quality update, additional data has been added to accurately identify compatible devices. This allows expanding 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.
- Fix for BitLocker issue. Fixed an issue where the device could enter BitLocker recovery mode after Secure Boot updates.
- Network (SMB over QUIC). Improved reliability when using SMB compression over QUIC. After installing the update, such requests execute more stably, reducing the likelihood of timeouts and improving overall connection performance.
- Remote Desktop (phishing protection). Enhanced protection against phishing attacks using Remote Desktop (.rdp) files. Now when opening an .rdp file, all connection parameters are displayed before establishing the connection, and they are disabled by default. A security warning also appears when opening such a file for the first time.
The update description does not list any specific known issues for KB5083768, however the main focus is on internal optimizations, update stability, and improving system reliability. The update includes all fixes and changes from the preview update KB5079489 (Build 28000.1764) for Windows 11, version 26H1.
Installation via Windows Update. Note: Automatic installation via Windows Update works only on devices with ARM processors. Go to Settings > Windows Update and click Check for updates. A computer restart is required to complete installation.
| Feature / Change | Performance Increase / Decrease | Optimization | PC Speed | Gaming Optimization |
|---|---|---|---|---|
| Emoji 16.0 | ⚪ No impact | 🟢 High (new glyph set, minor memory footprint) | ⚪ No impact | ⚪ No impact |
| Windows Backup | 🟡 Medium (background restore may slow first login) | 🟢 High (automatic settings/app restore) | 🟡 Medium (temporary slowdown during restore) | ⚪ No impact |
| Quick system recovery | 🟢 High (fewer failed boots) | 🟢 High (automatic system checks) | 🟡 Medium (faster recovery, minimal impact) | ⚪ No impact |
| Visual interface improvements and network speed test | 🟡 Medium (slight GPU load from UI) | 🟢 High (built-in network diagnostics) | 🟡 Medium (more responsive UI) | ⚪ No impact |
| Secure Boot | ⚪ No impact | 🟡 Medium (staged certificate rollout) | ⚪ No impact | ⚪ No impact |
| Fix for BitLocker issue | 🟢 High (avoids recovery mode downtime) | 🟢 High (stable Secure Boot updates) | 🟢 High (no unexpected reboots) | ⚪ No impact |
| Network (SMB over QUIC) | 🟢 High (fewer timeouts) | 🟢 High (improved connection stability) | 🟢 High (faster SMB compression) | 🟡 Medium (better network performance for online games using SMB) |
| Remote Desktop (phishing protection) | ⚪ No impact | 🟡 Medium (slight delay for .rdp parsing) | ⚪ No impact | ⚪ No impact |
Find and Change Settings
| Setting | Where to find | How to change |
|---|---|---|
| Emoji 16.0 | Available system-wide via emoji picker (Win + .) | Open the emoji picker with Win + . (period) or Win + ; (semicolon) in any text field. The new Emoji 16.0 characters will be available automatically after the update. No manual setting is required. |
| Windows Backup | Settings > Accounts > Windows Backup | Open Settings > Accounts > Windows Backup. To enable automatic restoration of settings and applications upon first login, sign in with a Microsoft account and turn on the backup options for your folders, apps, and settings. The restoration will occur automatically when you set up a new PC or after a reset. |
| Quick system recovery | Settings > System > Recovery | Open Settings > System > Recovery. If the feature is available on your device, you will see "Quick system recovery" options. It may be enabled automatically on some devices. To change its behavior, check for available toggles or run system checks manually from the same page. |
| Network speed test | Taskbar network flyout | Click the network icon in the taskbar. In the network flyout, find the built-in network speed test option and click it to run a test. No additional settings are required to enable it. |
| Secure Boot certificate updates | Settings > Privacy & security > Windows Security | Open Settings > Privacy & security > Windows Security. Check the status of Secure Boot certificate updates there. On commercial devices this feature is disabled by default. Notifications and status icons are shown automatically. Certificate installation occurs in stages and only on compatible devices with successful update records. |
| BitLocker recovery fix | Settings > Privacy & security > Device encryption | No manual change is required. The fix is applied automatically after installing the update. To verify BitLocker status, go to Settings > Privacy & security > Device encryption or search for "Manage BitLocker" in Control Panel. |
| SMB over QUIC | Settings > Network & internet > Advanced network settings | No manual setting is required for the reliability improvement. SMB over QUIC connections will perform more stably after the update. You can manage related network settings in Settings > Network & internet > Advanced network settings. |
| Remote Desktop phishing protection | Settings > System > Remote Desktop | No manual change is required. When you open an .rdp file, all connection parameters are now displayed before connecting and are disabled by default. A security warning appears on first open. To enable or disable Remote Desktop itself, go to Settings > System > Remote Desktop and toggle the feature. |
Official announcement on the Microsoft website.
The last 10 Windows updates:
| Update | Build | Version | Windows | Channel | Date |
|---|---|---|---|---|---|
| KB5121157 | 28020.2818 | 26H1 | Windows 11 | Beta | 2026-08-31 |
| KB5121158 | 28120.2824 | 26H1 | Windows 11 | Experimental | 2026-08-31 |
| KB5121794 | 26300.9278 | 26H2 | Windows 11 | Preview | 2026-08-27 |
| KB5121132 | 28120.2760 | 26H1 | Windows 11 | Experimental | 2026-08-21 |
| KB5124040 | 26220.9223 | 25H2 | Windows 11 | Beta | 2026-08-21 |
| KB5124042 | 26340.9233 | 26H2 | Windows 11 | Experimental | 2026-08-21 |
| KB5121106 | 28020.2731 | 26H1 | Windows 11 | Beta | 2026-08-17 |
| KB5121109 | 28120.2738 | 26H1 | Windows 11 | Experimental | 2026-08-17 |
| KB5124036 | 26220.9202 | 25H2 | Windows 11 | Beta | 2026-08-17 |
| KB5124038 | 26340.9212 | 26H2 | Windows 11 | Experimental | 2026-08-17 |