Okopči text do Notepad.exe, ulož súbor napr.: Enable_Def.reg
Myšou klik-Merge

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

Reštart PC
---------------------------

Do cmd.exe, ako Správca, okopči::::::

sc start WinDefend

sc config WinDefend start= auto
sc start WinDefend

sc query WinDefend

Do Powershell:

Set-MpPreference -DisableRealtimeMonitoring $false

Do PowerShell:
DISM.exe /Online /Cleanup-image /Restorehealth

Do cmd.exe:
sfc /scannow