In win8 system, the third-party inf signature is invalid, which needs to be solved by setting advanced startup options. It is the default in win7 system, but it has changed in win8, which is worth noting.

1, put the mouse in the lower right corner of the computer and find the settings when the hidden toolbar appears on the right;

2. Click Settings to enter the next interface, and find "Change Computer Settings" in the lower right corner;

3. Then go to the next step and find "Update and Restore";

4. Go to the next step, find "Restore", click to view advanced options, and then click "Restart";

5. After restarting, enter the next interface, "Select an option" and then click "Troubleshooting";

6. Enter the next interface and click "Advanced Options";

7. Go to the next step and click "Start Setting";

8. Next, click "Restart". After restarting, enter the setting interface, and select F7, "No driver signature";

9. When the installation is completed, restart and then continue the installation program, which is always allowed!

Note: the setting of win8 has changed and needs to be set step by step!