I digitally sign my mini filter with my EV cert and get the MS signature on the .sys and .cat through the Hardware Dev Center. All works great and the filter installs just fine on Windows 10 but on Windows 8.1 I get an ERROR_SIGNATURE_OSATTRIBUTE_MISMATCH from SetupCopyOEMInf(). I thought one and the same signature should suffice for 7, 8, 8.1 & 10? Or is this possibly due to a .inf mistake or a wrong VS project setting on my end? I don't really know where to start looking for what might be wrong and am baffled by the fact that it installs/works on Windows 10.
Thank You
I didn't find the right solution from the Internet.