Okay, I converted the base file but still wasn't able to get it to load in Hyper-V 2016. Then I tried converting it to a vhd and loading it into Hyper-v 2008r2. This still didn't work but I ran a Windows repair and then was able to get the VM to boot and load Windows.

Thanks for you help!

Anyone have anymore idea's that I can try? I would really like to avoid rebuilding this server if I can.

Thanks

Sorry, I left that out of what I tried.
The first time I converted it I did so without checking Repair mode.

Any help you all can offer would be much appreciated. I'm trying to convert an old ESXi 4 vm running Windows Server 2003 to Hyper-v 2016. When I export the VM datastore files there is a -flat.vmdk file. I've ran that file through V2V choosing VHDX type and checking Activate Windows Repair Mode. That...