Hello, according to the situation you described, you can press F8 to enter the safe mode after booting, uninstall the current graphics card driver, download and install this driver in Lenovo official website after restarting the computer, and do not use third-party software, which may lead to system instability.

Enter the host number to download the driver, and pay attention to matching the correct operating system.

Lenovo product driver download:

/lenovo/wsi/Modules/Drive.aspx？ seq= 1

Because I don't know the actual situation of my machine, I can also back up the data and try to restore the factory system.

The non-genuine system is unstable and is not recommended to you.