If you have a GPD Duo from the first batch released in early to mid December 2024, then your device may have a screen tearing issue due to older drivers. You should not need to install these drivers unless you have an early model or have been instructed to install them. It could result in you installing older drivers than what is currently installed on your GPD Duo.
You can download the latest drivers from here.
Extract the contents of the archive download to a folder on your GPD Duo. Then double click the AutoInstallDrivers.bat file and let it update the drivers.
Once the installation process has fully completed, please reboot your GPD Duo and you can start using it again.