Paul Titchener wrote:
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.
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 install.
But Win 7 and Win 8 machines give us a bad cert message when we try to
install these dual signed drivers.