*3 The CPU usage rate of the Antimalware Service Executable process does not change significantly from the state of 1. *2 The CPU usage rate will be as shown above after about 5 minutes have passed since Windows started. *1 Usage rate is when virus scanning is not performed. The CPU usage of the Antimalware Service Executable process is always 50-80% when connected to my home(wireless LAN) or public network(e.g.When connected to the company network (wireless LAN), the CPU usage rate of the Antimalware Service Executable process is always around 0-10%.Security: Windows firewall is on, security software other than Windows Defender is not installed, virus full scan does not detect virus
Windows update: Apply the latest version up to 8 (only recommended and automatically applied, WSUS not used) It is not clear when this phenomenon occurred, but in the following environmentĪntimalware Service Executable process (MsMpEng.exe) CPU usage is constantly high.ĭomain: AD joined (user has Domain Users authority) *Sorry for It's not exact English because it's a machine translation.
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