Hi There,
vSphere fails at SSH.
Vmware needs drivers. might need workstation pro which I don't have. Only have VMware player free.
Hyper-V needs hyper-v installed.
Virtualbox starts the process but hangs at the powershell scripts. Using virtualbox-windows-2012R2-serverstandard-amd64.json. Had to disable the uefi part in the autounattend.xml file. See below.

The packer log only gives a mix of these messages:
2017/11/28 11:20:44 packer.exe: 2017/11/28 11:20:44 [DEBUG] connecting to remote shell using WinRM
2017/11/28 11:20:44 packer.exe: 2017/11/28 11:20:44 [ERROR] connection error: http response error: 401 - invalid content type
2017/11/28 11:20:44 packer.exe: 2017/11/28 11:20:44 [ERROR] WinRM connection err: http response error: 401 - invalid content type
2017/11/28 11:20:49 packer.exe: 2017/11/28 11:20:49 [INFO] Attempting WinRM connection...
2017/11/28 11:20:49 packer.exe: 2017/11/28 11:20:49 [DEBUG] connecting to remote shell using WinRM
2017/11/28 11:22:15 packer.exe: 2017/11/28 11:22:15 [ERROR] connection error: unknown error Post http://127.0.0.1:2962/wsman: read tcp 127.0.0.1:60547->127.0.0.1:2962: wsarecv: An existing connection was forcibly closed by the remote host.
2017/11/28 11:22:15 packer.exe: 2017/11/28 11:22:15 [ERROR] WinRM connection err: unknown error Post http://127.0.0.1:2962/wsman: read tcp 127.0.0.1:60547->127.0.0.1:2962: wsarecv: An existing connection was forcibly closed by the remote host.
I would love to use Packer but this is a real pain and documentation + google searches provide very limited help.
Anybody knows whats up?