Microsoft Security Essentials includes a command-line utility which can be used to update the virus/malware definitions, initiate a scan, undo a recent definition update and perform other tasks. To know how to use the command-line utility, open a Command Prompt window (CMD.EXE) and execute the following command:
|-? / -h
|Displays all available options for this tool.
|-Trace [-Grouping #] [-Level #]
|Starts diagnostic tracing
|Restores the installed signature definitions to a previous backup copy or to the original default set of signatures
|Resets the registry values for Microsoft Antimalware Service settings to known good defaults
|Checks for new definition updates
|Scans for malicious software
|-Restore -Name <name> [-All]
|Restore the most recently or all quarantined item(s) based on name
|Collects support information
In addition to the above information, detailed information for each command-line parameter is shown when you run the above command.
To update the MSE virus/malware definitions, use this command:
The command-line tool can be useful if you want to update MSE using Batch file, Script or using Task Scheduler.
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