Log on as the local system admin (must be the local system administrator account, no other admin account works)
Then run:
- winrm quickconfig -quiet
- winrm set winrm/config/client @{TrustedHosts="*"}
Optional (lets chunky stuff be passed around):
- Powershell Set-PSSessionConfiguration -name ` microsoft.powershell -MaximumReceivedObjectSizeMB 1000 -Force