How do I kill "Antimalware Service Executable" [duplicate]

Solution 1:

To disable the Defender run regedit.exe, go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender, take ownership of this registry key (inside regedit.exe (still applies to Windows 10) or via the 3rd party tool RegOwnershipEx) and set the values DisableAntiSpyware and DisableAntiVirus both to 1.

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Note, if you only see 1 of the values, change this one.

In newer Windows 10 Versions (1703, 1709, 1803) you need to go key HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender, create a DWORD DisableAntiSpyware and set it to 1:

Attention: DisableAntiSpyware is ignored for Windows 10 (1903 and newer versions) since August 2020:

DisableAntiSpyware is intended to be used by OEMs and IT Pros to disable Microsoft Defender Antivirus and deploy another antivirus product during deployment. This is a legacy setting that is no longer necessary as Microsoft Defender antivirus automatically turns itself off when it detects another antivirus program. This setting is not intended for consumer devices, and we’ve decided to remove this registry key. This change is included with Microsoft Defender Antimalware platform versions 4.18.2007.8 and higher KB 4052623. Enterprise E3 and E5 editions will be released at a future date. Note that this setting is protected by tamper protection. Tamper protection is available in all Home and Pro editions of Windows 10 version 1903 and higher and is enabled by default. The impact of the DisableAntiSpyware removal is limited to Windows 10 versions prior to 1903 using Microsoft Defender Antivirus.