The need to perform an offline scan will also be revealed in Microsoft Intune if youre using it to manage your endpoints. Alternatively, if Windows Defender determines that Microsoft Defender Offline needs to run, it will prompt the user on the endpoint. Our Windows Defender team are the one who areĬapable of providing the exact meaning of those lines. In Windows 10, version 1607, you can manually force an offline scan. Those logs are usually use for submission of errors or problems with ![]() In the new window that opens, change Not Configured to Enabled. Double-click on Scan removable drives in the list of settings that are displayed. Click on Administrative Templates > Windows Components > Microsoft Defender Antivirus > Scan. Usually the log contains a lot of lines with the string Internal signature match:subtype=Lowfi, but these don't seem to be real virus detections: They don't show up in Threat History and finds nothing ("No engines detected this file").Īccording to Moderator/Microsoft Agent Justine Pel in a thread in the Microsoft Community Forums, the log files are intended for submitting Windows Defender errors to Microsoft, therefore I suspect the Internal match entries are included for debugging purposes only: This displays a few folders in the main panel on the right. Youll be prompted that youre about to be signed out of Windows. T04:57:20.837Z Service launched successfully from: C:\ProgramData\Microsoft\Windows Defender\Offline Scanner Select Microsoft Defender Offline scan, and then select Scan now. You can tell that it is an offline scan log by the following line somewhere at the beginning: The log showing the offline scan run seems to be stored in a file below C:\Windows\Microsoft Antimalware\Support, using the naming scheme MPLog-.log (e.g. In previous versions of Windows: Select Threat history.In current version of Windows 10: Under Current threats, select Scan options, and then select Threat history.On the Virus
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