Why is it that the installation of the graphics card driver with LU Master fails, but the driver is already installed on the device manager?

- - Khan you use the driver wizard this is better you download it to try, if it does not work you can simply go to another computer to download a suitable for your computer graphics card driver, and then copy it over to install it, if this does not work then you can reinstall the computer, that is, the system will automatically install the older driver. The newer drivers are not necessarily better than the older ones, so if you have any questions, please ask.