How to Update Microsoft Defender and Run a Quick Scan in One Go

windows defender command-line switches

The Windows Defender command-line utility MpCmdRun.exe is prominently used for scheduling scans and updating the signature or definition files. The MpCmdRun.exe command usage info can be obtained by running MpCmdRun.exe with “/?” or without any parameter.

However, it doesn’t mention a useful switch that updates Windows Defender signatures and runs a Quick Scan at once. And this switch is not documented anywhere so far.Read more