Remoting in a computer with PowerShell is easier than connecting by VNC or RDC if you just need to do a few admin functions.
Enable PowerShell to accept remote connections.
Go to machine and run PowerShell as administrator. Run this command:
Enable-PSRemoting -Force Test Connection on Remote Computer
Test-WsMan COMPUTER
Remote into Computer
Enter-PSSession -ComputerName COMPUTER -Credential USER