Tim Roberts > Until recently, you could always submit any driver as an "unclassified" > device and get the the WHQL signature without the logo rights. > > HCK kit will automatically select the test items before running the test. For example, Windows HCK for Windows 8.1 RTM QFE list<http://msdn.microsoft.com/en-us/library/windows/hardware/dn284526.aspx#WIN81RTMLIST> - QFE Update 005 (Build ID: 8.100.26063)<http://msdn.microsoft.com/en-us/library/windows/hardware/dn284526.aspx#QFE_81_RTM_005> http://msdn.microsoft.com/en-us/library/windows/hardware/dn284526.aspx, How could I make the HCK studio treat my driver as "unclassified" driver? Is there another way than changing the “Class” and "ClassGUID" in .inf file? Tim Roberts > Why do you want the WHQL signature? Just for silent install? > > Customer don't trust drivers without WHQL signature. They can not get WHCK SYSTEM LOGO without each and every pre-installed driver is WHQL signed. Thank you! -- Danny