While it is normal for antivirus programs to consume system resources when running a scan, Windows Defender is far greedier than most. Full Scan relies heavily on the CPU and is not afraid to use whatever resources your system has available as a result, you may experience lag, delays, hanging and other system disruptions when it is running. At the same time, however, it can also be the cause of disproportionately high CPU usage.Īnother Windows Defender feature that may be responsible for slowing down your system is its Full Scan, which performs a comprehensive check of all files on your computer. This process allows Windows Defender to continuously monitor your computer for potential threats and provide real-time protection against malware and cyberattacks. Try It Now What is the msmpeng.exe Antimalware Service Executable?ĭo you use Windows Defender to protect your computer? If so, open up the Windows Task Manager (Ctrl + Shift + Esc or Start Menu > Task Manager), scroll through the list of background processes and you will find a process called Antimalware Service Executable and its corresponding file msmpeng.exe.
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