For x64 enterprise environments, this update patches a specific SmartScreen bypass flaw. Previously, malicious actors could craft files that bypassed the Mark of the Web (MotW) protections, tricking SmartScreen into suppressing warnings. KB5031358 hardens the SmartScreen prompt mechanism, effectively closing a loophole that was being actively exploited in the wild prior to Patch Tuesday. This makes the update non-negotiable for business environments, regardless of the "Moment 4" feature set.
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✅ Safe for broad deployment (with the noted BitLocker MDM exception). For x64 enterprise environments, this update patches a
These are designed to patch vulnerabilities in Windows 11, enhancing its security profile and protecting against known threats.
This content is designed for who need to understand, deploy, or troubleshoot this update. These are designed to patch vulnerabilities in Windows
wusa /uninstall /kb:5031358 /quiet /norestart
| 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 | Step-by-Step Fixes for Installation Failures
: In isolated scenarios, systems would install the update, fail to reboot cleanly, and trigger automatic system rollbacks. Step-by-Step Fixes for Installation Failures