Try BOOTICE, open the software and enter BCD smart editing mode, change disable signature verification to a hook to save global settings and save current settings, then go to bios to turn off secure boot

I am used to it. Users of Windows XP and Windows 7 operating systems may encounter a prompt that this driver is not a digitally authenticated driver when installing the driver. At this time, just click Continue to complete the driver installation. However, in the Windows 8.1 operating system, this prompt will not be displayed by default. The reason is that many operations here are completed automatically. If you don't know the rules, you will not be able to choose to update drivers that are not WHQL certified. This experience explains in detail how to turn off related settings so that non-signed drivers can continue to be updated.

Update error:

1. The old device driver has not been updated on the official website for a long time. After checking, the official website has a Vista driver (an inf file), and I used to use it. In the Windows 7 (64-bit) operating system, just change ntx86 to ntamd64, and the test will pass! However, in the Windows 8.1 operating system, an error message "The third-party INF does not contain digital signature information" is displayed, and the installation is not allowed to continue.

2. The digital certification driver is a driver certified by Windows Lab (WHQL). When the Windows 8.1 operating system is updated, it will automatically go online to the verification official website to find the driver that matches the device. Of course, it is impossible to cover old devices, so it is inevitable that error messages will pop up.

Solution:

1. ① Shake the mouse in the right corner of the screen, and the Charm menu → Settings will pop up.

② You can also press the Win+C key combination to bring up the Charm menu → Settings.

2. You can also press the Win+i key combination to directly open the settings interface, and then click the Change Computer Settings option at the bottom.

3. Click the General menu in the Settings tab, and then click Start Now on the right to restart the computer.

4. Click the Troubleshooting option.

5. Select Windows Startup Settings in Advanced Options and continue to click Restart.

6. Then select Disable driver signature enforcement (or press the F7 key) to restart the computer.

7. If there are multiple systems and the Windows 8.1 operating system is not the main system, there will be a corresponding selection menu. Similarly, click the Disable driver signature enforcement option in the boot selection menu and restart the computer.

8. Test the driver update again. A selection menu will appear. Click Always install this driver software.