Error Installing KB2920189 on Generation 2 Hyper-V VMs
You might get an error installing KB2920189 on any gen2 VMs. If you do, disable secure boot in the virtual machine settings and it should work.
That’s it – a quick & dirty post because I barely found any info on this issue. This problem took up far too much of my time so hopefully this workaround will help someone save the same frustration. Why this happens I don’t know; I’m a SharePoint dude ;)