win10-32/64/win2016 can install qemufwcfg driver correctly with latest virtio-win-prewhql-128,and msft has approve qemufwcfg submission.
So this issue has been fixed already.
change status to verified.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2017:2341