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This bug has been copied from bug #1624878 and has been proposed to be backported to 7.6 z-stream (EUS).

Verify the bug with builds:
virt-v2v-1.38.2-12.el7_6.1.x86_64
libguestfs-1.38.2-12.el7_6.1.x86_64

Steps:
1.Install latest virt-v2v on server.
2.Open virt-v2v manual paper and search info with keyword 'SHA-2'
# man virt-v2v|grep 'SHA-2' -A 4
Support for SHA-2 certificates in Windows 7 and Windows Server 2008 R2
Later versions of the Windows virtio drivers are signed using SHA-2 certificates (instead of
SHA-1). The original shipping Windows 7 and Windows Server 2008 R2 did not understand SHA-2
certificates and so the Windows virtio drivers will not install properly.

To fix this you must apply SHA-2 Code Signing Support from:
https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2015/3033929 before
converting the guest.

For further information see: https://bugzilla.redhat.com/show_bug.cgi?id=1624878

Result:
V2V man page have updated info about "Support for SHA-2 certificates in Windows 7 and Windows Server 2008 R2", so change the bug from ON_QA 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-2018:3659