Get-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI -Name LastLoggedOnUser | select -ExpandProperty LastLoggedOnUser
(Get-WmiObject -Class Win32_Process -Filter "Name = 'explorer.exe'").GetOwner() | select -ExpandProperty User
Notes
Get-ItemProperty -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI -Name LastLoggedOnUser | select -ExpandProperty LastLoggedOnUser
(Get-WmiObject -Class Win32_Process -Filter “Name = ‘explorer.exe'”).GetOwner() | select -ExpandProperty User
tags: Return current user, MrNetTek