VirtIO Drivers digital sign problem

Virtual Machines KVM forum
1

Morning,
I’m Enrico, a Windows Developer.
I’m creating an installer for VirtIO drivers with dpinst.exe.

Using old virtio drivers (0-1-52) I see this warning:

With new virtio drivers (0-1-63 and later) I see this other:

I tested a “cross sign” of the drivers with my company certificate:

signtool.exe sign /v /ac MSCV-GlobalSign.cer /s my /n "mycompany" /t http://timestamp.verisign.com/scripts/timstamp.dll netkvm.sys

but the warning is the same.

I think the first warning is better :wink:
What is it changed on virtio driver signing process?
What should I do?

Thanks!