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Microsoft Malware Protection Engine

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MpEngine.dll. What is it?

The MpEngine.dll is a Microsoft Malware Protection Engine.

This file is part of Microsoft Malware Protection. MpEngine.dll is developed by Microsoft Corporation. It’s a system and hidden file. MpEngine.dll is usually located in the %WINDOWS% sub-folder and its usual size is 2,730,536 bytes.


The MpEngine.dll process is safe and disabling it can be dangerous, because programs on your computer need it to work correctly.

We also recommend optimizing your computer.

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General Information

Security risk: Free spyware & virus scanRegistry Errors: Free scan (run Registry Cleaner)Uninstallation: N/A Uninstall (run Unistall Manager)Disk & Memory Usage: N/A Free scan (run Task Manager)


Author: Microsoft CorporationProcess: Microsoft Malware Protection EnginePart Of: Microsoft Malware ProtectionCommon path(s): subfolder in %WINDOWS%
c:\ProgramData\Microsoft\MicrosoftAntimalware\Definition Updates\Backup
c:\ProgramData\Microsoft\Windows Defender\DefinitionUpdates\{5E542560-7E4E-43CD-9CCC-5698D9BDE54E}
f:\ProgramData\Microsoft\Windows Defender\DefinitionUpdates\Default
subfolder in %COMMON_APPDATA%
Keywords(s): systemFilesize(s): 2,730,536 bytes, 6,762,896 bytes, 6,557,240 bytes, 6,734,704 bytes

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