sometimes it calls Antimalware Service Executable this problem
easy fix :
Press the Windows Key + R, type in regedit in the Run dialog box and click OK to open the Windows Registry.
In the Registry Editor, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
If you see a registry entry named DisableAntiSpyware, double click to edit it and change its value
full guide how to fix high CPU usage
Posts made by norbertwebb
RE: Constant high CPU usageOpera for computers