The Third-Party INF Does Not Contain Digital Signature Information

If you are trying to install a driver from a small developer or you want to use an old driver, you may see this alert:

Windows Encountered a Problem Installing the Driver Software For Your Device

Windows found driver software for your device but encountered an error while attempting to install it

The Third-Party INF Does Not Contain Digital Signature Information

In my case I was trying to install a 5 year old Contex Scanner ($20K!) into a Windows 10 PC when I saw this error.  In previous operating systems you would receive the same error but have a button (in red I believe) that let you click on INSTALL ANYWAY.  Under Windows 10, you have two choices to get Windows to not check for Digital Signatures:

SCRIPT TO DISABLE DIGITAL SIGNATURE CHECKING:

1. Launch an elevated CMD prompt (run as Admin)
2. Type in:
   bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS
   and press the ENTER key
3. Type in:
   bcdedit /set testsigning on
   and press the ENTER key
4. Try the install again

GUI TO DISABLE DIGITAL SIGNATURE CHECKING:

1. Click START and type RECOVERY OPTIONS (not Recovery Control Panel)
2. Click ADVANCED STARTUP and let it reboot
3. After boot, click on ADVANCED OPTIONS > STARTUP SETTINGS
4. Then select DISABLE DRIVER SIGNATURE ENFORCEMENT from the list
5. The machine will boot and then you can install your unsigned drivers and have a happy day

Note that the specific text will be slightly different depending on your version of Windows 10 but the process remains the same.  If you have other questions, you might find THIS Microsoft post useful.

FYI:

https://www.cnblogs.com/zhengrui0452/archive/2013/06/03/3115121.html

https://www.urtech.ca/2016/01/solved-the-third-party-inf-does-not-contain-digital-signature-information/#:~:text=GUI%20TO%20DISABLE%20DIGITAL%20SIGNATURE,STARTUP%20and%20let%20it%20reboot&text=Then%20select%20DISABLE%20DRIVER%20SIGNATURE,and%20have%20a%20happy%20day