Since last February, kernel drivers should be passed with HLK to load well,
however I found MS signed (Attestation) kernel drivers worked well on Windows 10 as well as 7 and 8.1
(Windows filter driver could be passed with Attestation but could not be loaded, though.)
I searched Microsoft's certificate from the 2 signed drivers and certificates are slightly different.
Can we say Attestation signing is almost equal to HLK(WHQL) signing?
