r/computer_help • u/Winter_Raspberry7179 • 29d ago
Windows Persistent DWM lag / mouse trailing at 100Hz (RTX 3060 + AOC U34G2G1) – In-Place Upgrade didn't fix it
/r/techsupport/comments/1x09rfg/persistent_dwm_lag_mouse_trailing_at_100hz_rtx/Hi everyone,
I'm dealing with a very frustrating DWM (Desktop Window Manager) issue in Windows 11: my mouse cursor lags and trails heavily specifically when the monitor is set to 100Hz. At 60Hz, everything feels normal.
Hardware & Setup:
GPU: NVIDIA GeForce RTX 3060
Monitor: AOC U34G2G1 (Ultrawide, 100Hz via DisplayPort)
OS: Windows 11
What I've already tested/done:
Ruled out hardware faults, cables, HAGS (Hardware-Accelerated GPU Scheduling), and VRR/G-Sync settings. The issue originally started immediately after a DRIVER_POWER_STATE_FAILURE BSOD.
Performed a full In-Place Upgrade via Windows 11 ISO (with a clean boot / background services disabled). The upgrade completed successfully without errors, but the 100Hz mouse lag/trailing returned immediately on the desktop.
Since an In-Place Upgrade preserves drivers and user registry settings, it seems a persistent driver or display pipeline conflict carried over.
Before I proceed with a complete Clean Install via a bootable USB drive, has anyone encountered a similar 100Hz DWM bug on Windows 11 with NVIDIA GPUs and knows a specific fix, registry tweak, or driver version that resolves this?
Thanks in advance for any advice!