Microsoft released cumulative update KB5078883 for Windows 11, version 23H2 (2023 Update) as part of Patch Tuesday (March 2026). The cumulative update package KB5078883 (Build 22631.6783) is intended for Windows 11, version 23H2 (Windows 11 2023 Update) based on x64 (amd64) and ARM64 processors for Enterprise and Education editions.
The update includes security fixes as well as quality improvements from update KB5075941, released on February 10, 2026. It contains various security improvements for internal OS functions for March 2026. As part of Patch Tuesday (March 2026), Microsoft fixed 79 security issues, including two publicly disclosed zero-day vulnerabilities.
- Secure Boot. Improvement: Windows quality updates now use additional data to accurately identify devices that can automatically install new Secure Boot certificates. Devices receive new certificates only after the system records a sufficient number of successful update signals, ensuring controlled and phased deployment. New PowerShell capabilities have also been added to manage Secure Boot key updates: the Get-SecureBootUEFI command now supports the -Decoded parameter, allowing Secure Boot keys and certificates to be displayed in a human-readable format; the Get-SecureBootSVN command allows you to check the Secure Boot version number (SVN) for the UEFI firmware and bootloader, as well as determine whether the device complies with the current Secure Boot policy.
- File History. Improved reliability of the File History feature in Control Panel. It now correctly creates backups of files whose names contain Chinese characters and characters from the Private Use Area.
- Graphics. Improved stability on some GPU configurations, helping devices shut down more correctly when powered off. Also improved stability of the graphics subsystem under intensive loads. This enhances the reliability of games and 3D applications.
- Text and Fonts. Updated Windows system fonts — added a new currency symbol for the Saudi riyal. This ensures correct display of the currency in applications and the system interface.
- Windows System Image Manager. Improved reliability when selecting trusted catalog files. A warning dialog box now appears to help ensure that the selected file comes from a trusted source.
If previous updates are already installed on the device, the system will download and install only the new fixes included in the KB5078883 package. Cumulative update 5078883 for PCs is installed automatically through Windows Update for Enterprise and Education editions. To check, go to Settings > Windows Update and click Check for updates.
| Feature / Change | Performance Increase / Decrease | Optimization | PC Speed | Gaming Optimization |
|---|---|---|---|---|
| Secure Boot – phased certificate deployment via update signals | ⚪ No measurable impact (boot unchanged) | 🟢 High – controlled, staged rollout reduces failure risk | 🟡 Slight improvement in boot reliability, not raw speed | ⚪ No direct impact |
| Secure Boot – new PowerShell capabilities (Get-SecureBootUEFI -Decoded, Get-SecureBootSVN) | ⚪ No impact | 🟢 High – easier diagnostics and policy compliance checks | ⚪ No impact | ⚪ No impact |
| File History – fixed backups for Chinese and Private Use Area characters | ⚪ No impact | 🟢 High – backup reliability improved | ⚪ No impact | ⚪ No impact |
| Graphics – improved stability on some GPU configurations during shutdown | ⚪ No performance drop | 🟡 Medium – cleaner power-off state, fewer hangs | 🟢 Slight improvement in shutdown speed on affected GPUs | 🟡 Low – fewer crashes after long gaming sessions |
| Graphics – improved stability under intensive loads | 🟢 Up to 3–5% in sustained GPU-heavy scenarios (stability-bound) | 🟢 High – fewer driver timeouts and TDR events | 🟡 Marginal improvement in 3D application smoothness | 🟢 Medium – more reliable frame pacing in games and 3D apps |
| Text and Fonts – new Saudi riyal currency symbol | ⚪ No impact | ⚪ No impact | ⚪ No impact | ⚪ No impact |
| Windows System Image Manager – trusted catalog warning dialog | ⚪ No impact | 🟢 High – prevents use of untrusted catalog files | ⚪ No impact | ⚪ 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 |