They have a minimal difference between each other, and smartscreen.exe can still be found and opened. This process substituted the smartscreen.exe – previous variant of the antivirus software task.
Removing the viruses with GridinSoft Anti-MalwareĪs it was mentioned, msmpeng.exe is a process of Microsoft Defender 1 – the embedded security tool, which is present in every Windows 8.1/10. Can the msmpeng.exe process be malicious?. Can I improve my PC performance by stopping the msmpeng.exe?. If everything seems to be fine after that, you need to check all third-party applications for issues by running them one by one. You need to perform a clean boot of Windows 10. In a few situations issue could be caused by a third-party application or service. Sometimes msmpeng.exe can cause a high disk usage - you need to check the PC’s hard drive for errors (by running chkdsk command). 
In such cases you can try to use an advanced antimalware and/or antivirus tool
In case when Windows Defender “missed” the virus or malware and your machine has been infected, Antimalware Service Executable process can cause a high RAM usage. You can try to completely remove this software In case you have an old version of other third-party antivirus software installed on your computer, it can cause a conflict between Windows Defender and the software. In case after the restart everything is OK, you might need to disable some applications to auto start during Windows boot Check if the CPU load is similar after you are using Shut down button to turn off your computer and when you are using Restart button in your Start menu. In such cases the following tips can help you fix the problem: It’s important to mention that in some cases msmpeng.exe can also cause high resources usage because of other issues. While installing applications and games, unpacking archives, downloading executable files from Internet. 
When you leave your computer for some time and then an automatic maintenance starts. 
Right after boot or after some time (after a few minutes on some old laptops). In case your Windows 10 is functioning properly, the issue with msmpeng.exe can appear in the next situations:
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