[wdmaudiodev] Re: How to sign up with MS with the Win10 driver no charge "attestment" option

  • From: "Paul Titchener" <pt@xxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Sun, 25 Oct 2015 12:38:10 -0700

We’re now shipping our software that includes a Win 10 signed driver and for
most users it working correctly, both for users that did an upgrade to Win 10
and those that bought new Win 10 machines.
For now we detect the OS version during installation and Win 10 machines get
drivers signed both by us and MS, other OS’s get the drivers only signed by us.
But we’re occasionally hitting installation problems on some machines, commonly
(and maybe exclusively) Win7 ones, where they report that they get a message
about attempting to install an unsigned driver.
I’m wondering if these cases are being caused by a faulty OS detection by the
Tim, you had mentioned that here is an approach to build a single driver that
installs both on Win 10 and Win 7, 8 and 8.1 machines.
I thought the way we were signing our drivers, which is to sign them first with
our cert before submitting to MS, was the method that allowed this single
But Win 7 and Win 8 machines give us a bad cert message when we try to install
these dual signed drivers.
Was there another step (or different method) we need to take to build a single
driver that will install on a Win 7, 8 and 10 machine?
Paul Titcener

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