Some times you need to reboot a remote machine as part of your process. PowerShell provides the Restart-Computer cmdlet to perform that task:
Restart-Computer -ComputerName server03
If you want you process to pause until the reboot has finished then you add the –Wait parameter:
Restart-Computer -ComputerName server03
You final options when pausing are to wait until a specific service – PowerShell, WinRM or WMI is avialable:
Restart-Computer -ComputerName server03 -Wait -For PowerShell
Restart-Computer -ComputerName server03 -Wait -For WinRM
Restart-Computer -ComputerName server03 -Wait -For Wmi
These options should cover most situations as these services are among the last to become available when a machine starts.
under: PowerShell Basics