WDF device driver signed, verified, installs successfully, but doesn't show as Signed in Device Manager -> Driver Details dialog RRS feed

  • Question

  • We have a digital signature from Verisign to sign our WDF device driver, and we are signing our drivers successfully.
    We've worked with Verisign to verify the code signing chain and all looks good to us and the Verisign reps.
    We use WDDK 7.1 Inf2Cat to create a catalog file, and SignTool to sign it, and it is all successful.
    We can use the WDDK 7.1 SignTool verify to verify that the signatures are good, with Microsoft Code Verification root at the top of the chain.
    When installing our driver, Windows says the driver is from a known publisher, and installs without complaint.
    Device manager Driver tab shows the Digital Signer as our company.


    Device manager > Driver Details button shows our .sys file AND the
    WdfCoinstaller01009.dll (from Microsoft) as NOT digitally signed.

    This is driving me nuts. I have read everything I can find from Windows and elsewhere. Any help?

    Wednesday, July 3, 2013 10:46 PM

All replies

  • Hi

    Did you ever get this answered?  I have the same problem, everthing looks great until selecting the Driver Details button and it indicates 'Not digitally signed'.

    This is also driving me nuts!

    I feel like it's something in the .inf file, but don't know what.  If I look directly at the properties of my sys file in Windows Explorer it indicates the file is signed.  So whats the problem?

    Hope you have an answer.

    Friday, January 3, 2014 12:45 AM
  • I ended up sending the question to the Microsoft System Development group ( The answer was that it has to be WHQL certified... or that's the implication anyway. Here's the response, you decide:

       If you driver is signed by Microsoft (WHQL signature) then you will see Microsoft name as signed on device manager driver properties.

       Best Regards,

       Siva ,

       SysDev Dashboard Support Engineer,

       Windows SysDev Dashboard,

       Email: Web: 

    Friday, January 3, 2014 8:50 PM