Vyrob si v Notepad.exe súbor, ulož ho na plochu s príponou *.reg.
Napríklad s názvom: def_enable.reg

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Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SecurityHealthService]
"Start"=dword:00000002

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc]
"Start"=dword:00000002

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender]
"DisableAntiSpyware"=dword:00000000
"DisableRealtimeMonitoring"=dword:00000000
"PUAProtection"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\MpEngine]
"MpEnablePus"=dword:00000001

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection]
"DisableBehaviorMonitoring"=dword:00000000
"DisableOnAccessProtection"=dword:00000000
"DisableScanOnRealtimeEnable"=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Systray]
"HideSystray"=dword:00000000

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Myšou klik na *.reg, v kontexte roletky klik klik na Merge (spojiť) s Registrami.

Reštart PC.

Ak vec nezaberie, potom si vytvor nový účet ako "Superadmin" v cmd.exe, spustený ako Správca týmto príkazom:

Net user administrator /active:yes