Software tool: Win8 professional edition
1. Right-click the Start menu and select Click to open the Command Prompt (Administrator).
2. In the CMD window, enter bcdedit.exe? /setting? nointegritychecks? You can copy it, then right-click in the CDM window and choose Paste.
3. After pressing Enter, if the prompt is successful, the verification will be disabled. Then, you can install unsigned drivers.
4. If you want to restore the verification driver, please enter bcdedit.exe in CMD? /setting? nointegritychecks? Press Enter to execute.
Note: You need to open the command prompt as an administrator to run the above command, otherwise you will be prompted "Unable to open the startup configuration data store. Access denied.