Windows 11 KB5074109 January Cumulative Update Triggers Gaming Performance and Stability Issues
Microsoft’s January Windows 11 cumulative update KB5074109 has been linked to gaming performance degradation and instability on systems using NVIDIA GeForce GPUs, with users reporting 15–20 FPS drops, black screens, and visual artifacting after installation. NVIDIA acknowledged the issue publicly via its GeForce forums, stating it is investigating and that uninstalling KB5074109 appears to be the only effective temporary mitigation; some users also report that installing Microsoft’s latest optional updates may resolve the problem without removing the security update.
The update is described as security-critical (reported as addressing 114 vulnerabilities), creating a tradeoff between stability and exposure if the patch is removed. Separately, Microsoft has been issuing multiple out-of-band (OOB) fixes following January Patch Tuesday to address regressions (e.g., Remote Desktop credential prompt failures and Outlook Classic .pst access issues on cloud storage) and also shipped an OOB fix for an Office zero-day (CVE-2026-21509, a security bypass), underscoring a broader pattern of post-release remediation activity around the January patch cycle.
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