Summary: Use Windows PowerShell in Windows 8.1 to get Windows Defender status information.

Hey, Scripting Guy! Question I recently upgraded to Windows 8.1, and I want to know how to use Windows PowerShell to determine the status.

Hey, Scripting Guy! Answer Use the Get-MpComputerStatus function. It reports the status of Windows Defender services,
          signature versions, last update, last scan, and more.

Get-MpComputerStatus