Guys, do you remember when one of the Windows updates left the keyboard and mouse unusable in Windows Safe Mode?
https://forums.flightsimulator.com/t/windows-11-25h2-24h2-and-msfs-observations-insights-issues-and-tips/657704/230
The issue turned out to be even more serious, because it turns out it also affected the performance of NVIDIA GPUs.
NVIDIA has released a very important hotfix that addresses and fixes the issue where lower performance may be observed after installing the Windows 11 update KB5066835.
https://forums.flightsimulator.com/t/nvidia-geforce-hotfix-driver-581-94-discussion-thread/747578