Enter-PSSession -computername Win2012SrvCore -credential administrator

$passwd = convertto-securestring -AsPlainText -Force -String MYPASSWORD

$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist "administrator",$passwd

$session = new-pssession -computername Win2012SrvCore -credential $cred

PowerShell.exe -Command Enter-PSSession -computername Win2012SrvCore -credential administrator

C:WINDOWSsystem32WindowsPowerShellv1.0powershell.exe