@setlocal enableextensions enabledelayedexpansion
@echo off

rem Make sure we're running as admin. Got this garbage from https://stackoverflow.com/a/40388766
if not "%1"=="am_admin" (
    powershell -Command "Start-Process -Verb RunAs -FilePath '%0' -ArgumentList 'am_admin'"
    exit /b
)

rem USE AT OWN RISK AS IS WITHOUT WARRANTY OF ANY KIND !!!!!
rem
rem Modified version of
rem https://raw.githubusercontent.com/mattreecebentley/win10_disable_defender/main/win10_enable_defender.bat
rem https://gist.github.com/xezrunner/a7a42dbc1096a40b0c78f09488fe5a2b
rem
rem Resources:
rem https://docs.microsoft.com/en-us/powershell/module/defender/set-mppreference?view=win10-ps
rem https://docs.microsoft.com/en-us/windows/threat-protection/windows-defender-exploit-guard/customize-exploit-protection
rem https://github.com/AndyFul/ConfigureDefender
rem https://github.com/AndyFul/Hard_Configurator

echo.
echo Enabling Windows Defender
reg query HKLM\SYSTEM\Setup /v DisabledDefenderServices | find "0x0"
if %errorlevel% == 0 goto already_patched

reg delete "HKLM\Software\Policies\Microsoft\Windows Defender" /f
reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Run" /v "SecurityHealth" /t REG_EXPAND_SZ /d "\"%windir%\system32\SecurityHealthSystray.exe\"" /f

echo.
echo Restore WD shell
reg add "HKLM\Software\Classes\*\shellex\ContextMenuHandlers\EPP" /ve /t REG_SZ /d "{09A47860-11B0-4DA5-AFA5-26D86198A780}" /f
reg add "HKLM\Software\Classes\Drive\shellex\ContextMenuHandlers\EPP" /ve /t REG_SZ /d "{09A47860-11B0-4DA5-AFA5-26D86198A780}" /f
reg add "HKLM\Software\Classes\Directory\shellex\ContextMenuHandlers\EPP" /ve /t REG_SZ /d "{09A47860-11B0-4DA5-AFA5-26D86198A780}" /f

echo.
echo Enable WD services
reg add "HKLM\System\CurrentControlSet\Services\BFE" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\MpsSvc" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\SecurityHealthService" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\SgrmBroker" /v "Start" /t REG_DWORD /d "2" /f

reg add "HKLM\System\CurrentControlSet\Services\wscsvc" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\WdBoot" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\wdFilter" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\WdNisDrv" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\WdNisSvc" /v "Start" /t REG_DWORD /d "2" /f
reg add "HKLM\System\CurrentControlSet\Services\WinDefend" /v "Start" /t REG_DWORD /d "2" /f

echo.
echo 1 - Enable Logging
reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderApiLogger" /v "Start" /t REG_DWORD /d "1" /f
reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderAuditLogger" /v "Start" /t REG_DWORD /d "1" /f

echo.
echo Enable WD Tasks
schtasks /Change /TN "Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /Enable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Enable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Enable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /Enable
schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Verification" /Enable

echo.
echo Setting various preferences
rem CloudExtendedTimeout / 1 - 50 / block a suspicious file for up to 60 seconds (Default is 10)
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpBafsExtendedTimeout" /t REG_DWORD /d "0" /f

rem CloudBlockLevel / 0 - Default / 2 - High / 4 - High+ / 6 - Zero tolerance (block all unknown executables)
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpCloudBlockLevel" /t REG_DWORD /d "0" /f

rem 1 - Potentially Unwanted Application protection (PUP) is enabled, the applications with unwanted behavior will be blocked at download and install-time
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpEnablePus" /t REG_DWORD /d "1" /f

rem Block at First Sight / 0 - Enable / 1 - Disable
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "DisableBlockAtFirstSeen" /t REG_DWORD /d "0" /f

rem Cloud-based Protection / 0 - Disable / 1 - Basic / 2 - Advanced
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SpynetReporting" /t REG_DWORD /d "1" /f

rem Send file samples when further analysis is required / 0 - Always prompt / 1 - Send safe samples automatically / 2 - Never send / 3 - Send all samples automatically
reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SubmitSamplesConsent" /t REG_DWORD /d "0" /f

echo.
echo Attempting to enable Tamper Protection. If this fails then you need to do it manually.
reg add "HKLM\Software\Microsoft\Windows Defender\Features" /v "TamperProtection" /t REG_DWORD /d "1" /f

rem To prevent WD using too much CPU, add this file to the exclusion list:
rem C:\Program Files\Windows Defender\MsMpEng.exe
echo.
echo Attempting to exclude MsMpEng.exe to reduce CPU usage
reg add "HKLM\Software\Microsoft\Windows Defender\Exclusions\Paths" /v "C:\Program Files\Windows Defender\MsMpEng.exe" /t REG_DWORD /d "0" /f

echo.
echo Finishing up...
reg add HKLM\SYSTEM\Setup /v DisabledDefenderServices /t REG_DWORD /d 0 /f

echo Windows Defender has (hopefully) been enabled.
echo The Antimalware Service Executable should be active again.
echo Restart your computer to see all changes.

goto eof

:already_patched
echo Defender has already been enabled by this script.

:eof
echo.
pause