Why Refresh Rate Automatically Changing

ASUS TUF A15, Windows 1, version 23H2. OS keeps changing refresh rate from 60 hz to 144 hz. When this occurs, the lower 1/3 of the task bar becomes black & white horizontal line, maybe 4 to six lines.
Right clicking on desktop I can select Display Settings > Advanced Display and change the refresh rate back to 60 hz. This will hold for ten to thirty minutes at which time the refresh rate changes back to 144 hz.
There is no Dynamic Refresh Rate (DRR) feature / option listed to allow me to disable any DRR function.

Is there a known 'fix' to clamp down the display refresh rate to 60 hz ?

Is there something in the Registry that can resolve this ?

Thanks in advance,
DEL

NVIDIA Control Panel ?
Intel® Graphics Command Center ?
MyASUS Software ?

Why do you need 60 Hz?
Let it be 144 Hz for the desktop.
Set your video card driver to 58 or 60 FPS.

abactuon said:

Why do you need 60 Hz?
Let it be 144 Hz for the desktop.
Set your video card driver to 58 or 60 FPS.

Click to expand...

When the PC changes to 144 hz, the lower 1/3 of the task bar becomes a series of black & white horizontal line, maybe 4 to six lines. Sometimes the horizontal lines will also occur at the top 1/2" of the screen as well as the bottom of the screen.

Besides, the 60 hz refresh rate works just fine for my needs.

Update Display Drivers: Outdated or corrupted graphics drivers can cause display anomalies. Visit your laptop manufacturer’s website and download the latest display driver updates for your specific model. While there check also for newer chipset, BIOS/UEFI firmware (very important), network, sound, USB3 and other drivers, comparing to the ones presently installed in Device Manager.

Maybe you have a hardware problem.

Check this setting in the Graphics section of Windows Settings. See screenshot attached.