Antimalware Service Executable (MsMpEng.exe) is a core component of Windows Defender, designed to protect your system from malware.The process might use significant CPU or memory resources due to scheduled scans, real-time protection, scanning large files, or outdated hardware.Disabling Antimalware Service Executable leaves your system vulnerable to malware and other threats.To manage resource usage, you can adjust scan schedules, exclude files or folders, or consider upgrading your hardware.