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The error “Windows requires a digitally signed driver” occurs when Windows blocks the installation of a driver when it is without a digital signature. Any help on this would be really appreciable.What are Digitally Signed Drivers? Digitally Signed Drivers are signed drivers from it’s vendors that ensures driver integrity and checksum to make sure that the Driver file being installed isn’t modified in anyway other then what the Signing Authority has allowed or modified. I have spent plenty of time on this and still end up with no results. (I dont know whether it is correct or not) Thumbprint of the cross signed certificate which can be seen from the properties of the signed file is ‎40 01 91 47 5c 98 89 1d eb a1 04 af 47 09 1b 5e b6 d4 cb cb.

HKR,CoInstallers32,0x00010000,"WdfCoInstaller01005.dll,WdfCoInstaller","WinUSBCoInstaller.dll"

I have tried Sha256 Signing also (Referring from (section :Internet Explorer or Chrome for Windows) signtool sign /v /ac "C:\path\DigiCert High Assurance EV Root CA.crt" /a /tr /td sha256 /fd sha256 "c:\path\to\FileToSign.cat"ĮDIT 2- Adding the source of the Inf file Gn /v /ac "C:\CodeSigning\DigiCert High Assurance EV Root CA.crt" /a /t ht I have used the following commands during the process of generating the. It still shows the warning Windows cant verify the publisher of this driver software.įor troubleshooting this I have tried installing the certificate in the target machine as one of the Stackoverflow link suggests. I am trying to install the driver via install-shield setup in the Windows 7 SP1 64 Bit machine with all latest updates installed( including KB3033929). I could see the digital signature in the app.cat file when I am see the properties of the file. The driver is sha 256 signed using a valid standard kernel mode code signing certificate issued by Digicert. I am trying install a windows USB driver with a simple structure (containing only the following content.