Windows Defender includes a command-line utility, MpCmdRun.exe, which can be handy if you want to automate the use of Windows Defender. The utility is located on Windows 7 at %ProgramFiles%\Windows Defender\MpCmdRun.exe.
The basic usage at the command prompt is: MpCmdRun.exe [command] [-options]
Here’s an overview of available commands:
|-?||Displays all available options for the tool|
|-Trace [-Grouping #] [-Level #]||Starts diagnostic tracing|
|-RemoveDefinitions [-All]||Restores the installed signature definitions to a previous backup copy or to the original default set of signatures|
|-RestoreDefaults||Resets the registry values for Windows Defender settings to known good defaults|
|-SignatureUpdate||Checks for new definition updates|
|-Scan [-ScanType]||Scans for malicious software|
|-GetFiles||Collects support information|
Tip by Matthew Graven, TechNet Tips Editor.