This cumulative release remedies multiple flaws within the core OS layer. Crucially, it patches actively exploited in the wild at the time of its release:
Beyond security, KB5031358 integrated several non-security improvements previously tested in the September 2023 preview:
| System | CPU | RAM | Storage | Boot Time (pre) | Boot Time (post) | Game FPS (Cyberpunk 2077) | | --- | --- | --- | --- | --- | --- | --- | | Desktop (High) | i9-13900K | 64GB DDR5 | NVMe Gen4 | 12.3s | 11.8s | 112 → 115 | | Laptop (Medium) | Ryzen 7 6800H | 16GB DDR5 | NVMe Gen3 | 16.1s | 15.4s | 78 → 80 | | Old Business PC | Core i5-7500 | 8GB DDR4 | SATA SSD | 24.7s | 23.9s | N/A |
KB5031358 is a cumulative security update for , bringing the Operating System (OS) Build to 22000.2538 . Release Date: October 10, 2023.
If you encounter errors like 0x800f0988 or 0x800f081f while installing, try these community-recommended steps: KB5031358 (OS Build 22000.2538)
The update also included fixes for a range of other vulnerabilities:
The primary focus of the October 2023 update was addressing critical vulnerabilities. Mitigation of HTTP/2 Rapid Reset Attack (CVE-2023-44487)
The was a critical security release deployed by Microsoft during its October 2023 Patch Tuesday cycle. Targeting Windows 11 Version 21H2 (OS Build 22000.2538), this specific update focused heavily on correcting underlying system vulnerabilities, neutralizing active zero-day threats, and bringing localized features from the "Moment 4" configuration push down to older Windows 11 architectures.
Get-ItemPropertyValue "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion" -Name CurrentBuildNumber # Expected: 22621
October 10, 2023 (Patch Tuesday) Version: Windows 11 22H2 (Build 22621.2428) KB Number: KB5031358 Architecture: x64-based Systems
To help you understand the landscape at the time, here is a comparison with the update for the then-current version of Windows 11.
202310 Cumulative Update For Windows 11 For X64based Systems Kb5031358 Exclusive
This cumulative release remedies multiple flaws within the core OS layer. Crucially, it patches actively exploited in the wild at the time of its release:
Beyond security, KB5031358 integrated several non-security improvements previously tested in the September 2023 preview:
| System | CPU | RAM | Storage | Boot Time (pre) | Boot Time (post) | Game FPS (Cyberpunk 2077) | | --- | --- | --- | --- | --- | --- | --- | | Desktop (High) | i9-13900K | 64GB DDR5 | NVMe Gen4 | 12.3s | 11.8s | 112 → 115 | | Laptop (Medium) | Ryzen 7 6800H | 16GB DDR5 | NVMe Gen3 | 16.1s | 15.4s | 78 → 80 | | Old Business PC | Core i5-7500 | 8GB DDR4 | SATA SSD | 24.7s | 23.9s | N/A | This cumulative release remedies multiple flaws within the
KB5031358 is a cumulative security update for , bringing the Operating System (OS) Build to 22000.2538 . Release Date: October 10, 2023.
If you encounter errors like 0x800f0988 or 0x800f081f while installing, try these community-recommended steps: KB5031358 (OS Build 22000.2538) If you encounter errors like 0x800f0988 or 0x800f081f
The update also included fixes for a range of other vulnerabilities:
The primary focus of the October 2023 update was addressing critical vulnerabilities. Mitigation of HTTP/2 Rapid Reset Attack (CVE-2023-44487) neutralizing active zero-day threats
The was a critical security release deployed by Microsoft during its October 2023 Patch Tuesday cycle. Targeting Windows 11 Version 21H2 (OS Build 22000.2538), this specific update focused heavily on correcting underlying system vulnerabilities, neutralizing active zero-day threats, and bringing localized features from the "Moment 4" configuration push down to older Windows 11 architectures.
Get-ItemPropertyValue "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion" -Name CurrentBuildNumber # Expected: 22621
October 10, 2023 (Patch Tuesday) Version: Windows 11 22H2 (Build 22621.2428) KB Number: KB5031358 Architecture: x64-based Systems
To help you understand the landscape at the time, here is a comparison with the update for the then-current version of Windows 11.