Hi Don,
Thanks for your reply. I have two separate mini filter .sys files, one for Win7 and the other for Win8+. I sign the Win7 with SHA1 and the Win8+ with SHA256 (including cross-cert & time stamp). I ran and passed all HCK/HLK tests on 7, 8.1 &
10. After getting the MS signatures from the Dev Center I can also look at their 'Certification Report' and it states:
Certified for Microsoft Windows 10 Client family version 1703, x64
Logo - Device - Compatible with Windows 7 x64
Certified for Microsoft Windows 8.1 Client family, x64
And yet it won't install/load on 8.1 (With test signing on I get a warning that the publisher cannot be verified; after selecting install anyway, all works fine). Do I have to do something differently when I sign my .sys or when I submit it to the Dev Center
or neither? Do I need a separate/special .sys file/signature for Win 8.1 as opposed to 10? Is there anything that would explain what the differences are when it comes to signing for 8 vs. 10?
Thanks,
Michael