In fact, this is because the system prevents the installation of unauthenticated drivers for security reasons, but sometimes some special devices can't pass the certified drivers, so obviously we can only install them normally by temporarily turning off the digital signature.

Specific methods:

1. Click the start menu, then press and hold the "SHITF key" to turn off the machine, click the power button, and select Restart;

2. After restarting, the system will enter the "Select an option" interface, and then we will select "Troubleshooting";

3. After troubleshooting, select "Advanced Options".

4. Next, we choose "Start Setup";

5. Next, in the startup settings, we can see several options (such as disabling driver forced signature), which cannot be selected at this time. Windows needs us to restart first to activate these options, so you can click restart;

6. After restarting, we can see many special startup mode options, including "Disable driver forced signature". We can press the number keys to select the system to enter, for example, press the 7 key;

7. Finally, enter the mode of disabling driver forced signature, and then we can install the driver, and the installation can be successful.