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Windows 11 Update Sparks Gaming Performance Crisis, NVIDIA Responds

11/26/2025

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Summary

Story summary

The October 2025 Windows 11 update KB5066835 caused performance issues for games, notably Assassin's Creed Shadows, with frame rates dropping 33%–50% on NVIDIA GPUs.
NVIDIA released a beta hotfix driver that improves performance, raising FPS from 149.7 to 202.3 post-fix.
The hotfix remains in beta.
Speculation centers on whether the issue stems from Microsoft's update or NVIDIA drivers.

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Story summary

The October 2025 Windows 11 update KB5066835 caused performance issues for games, notably Assassin's Creed Shadows, with frame rates dropping 33%–50% on NVIDIA GPUs.
NVIDIA released a beta hotfix driver that improves performance, raising FPS from 149.7 to 202.3 post-fix.
The hotfix remains in beta.
Speculation centers on whether the issue stems from Microsoft's update or NVIDIA drivers.