“DisableAntiSpyware is intended for use by OEMs and IT professionals to disable Microsoft Defender Antivirus and deploy another antivirus product during deployment. This is an inherited setting that is no longer needed as Microsoft Defender's antivirus turns off automatically when it detects another antivirus program. This setting is not intended for consumer devices, and we have decided to remove this registry key.
This change is included in Microsoft Defender Antimalware platform version 4.18.2007.8 and later 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 later and is enabled by default. The impact of DisableAntiSpyware removal is limited to pre-10 versions of Windows 1903 that use Microsoft Defender Antivirus. This change has no impact on third-party antivirus connections to the Windows Security application. These will still work as expected ”.
If you are afraid of your windows PC getting infected, protect yourself with AVG Internet Security 2020: the one-year license for a PC is on offer on Amazon for around 25 euros.It is no longer possible to disable Windows Defender via the registry