Executable files may, in some cases, harm your computer. exe extension on a filename indicates an executable file. MsMPEng stands for Micro soft Malware Protection Engine It is uninstalled if the overall security product name is removed via the Control Panel. It installs in a subdirectory of "C:\Program Files" whose name depends on the OS version: "\Microsoft Security Client" for XP/Vista/Win7, or "\Windows Defender" for Win8/8.1/10. When such products are installed, Windows Defender is deactivated. High CPU usage is a well-known side-effect of "msmpeng.exe", often a major reason that users install third-party antimalware products. It has been used since Windows XP both in consumer-oriented products, (Windows Defender, Microsoft Security Essentials), and by Microsoft enterprise products designed for managed software or server environments such as Forefront Client Security (FCS), meant only for Windows Server, not endpoint Windows. It performs the actual background real-time protective scanning for malware, viruses, and worms of files that it detects as having been created or updated recently. "MsMpEng.exe" is Microsoft's core antimalware executable. The genuine MsMpEng.exe file is a software component of Windows Defender by Microsoft Corporation.
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