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# Description:
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# This script disables Windows Defender. Run it once (will throw errors), then
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# reboot, run it again (this time no errors should occur) followed by another
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# reboot.
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Import-Module -DisableNameChecking $PSScriptRoot\..\lib\New-FolderForced.psm1
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Import-Module -DisableNameChecking $PSScriptRoot\..\lib\take-own.psm1
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Write-Output "Elevating priviledges for this process"
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do {} until (Elevate-Privileges SeTakeOwnershipPrivilege)
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$tasks = @(
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"\Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance"
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"\Microsoft\Windows\Windows Defender\Windows Defender Cleanup"
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"\Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan"
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"\Microsoft\Windows\Windows Defender\Windows Defender Verification"
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)
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foreach ($task in $tasks) {
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$parts = $task.split('\')
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$name = $parts[-1]
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$path = $parts[0..($parts.length-2)] -join '\'
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Write-Output "Trying to disable scheduled task $name"
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Disable-ScheduledTask -TaskName "$name" -TaskPath "$path"
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}
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Write-Output "Disabling Windows Defender via Group Policies"
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New-FolderForced -Path "HKLM:\SOFTWARE\Wow6432Node\Policies\Microsoft\Windows Defender"
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Set-ItemProperty -Path "HKLM:\SOFTWARE\Wow6432Node\Policies\Microsoft\Windows Defender" "DisableAntiSpyware" 1
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Set-ItemProperty -Path "HKLM:\SOFTWARE\Wow6432Node\Policies\Microsoft\Windows Defender" "DisableRoutinelyTakingAction" 1
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New-FolderForced -Path "HKLM:\SOFTWARE\Wow6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection"
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Set-ItemProperty -Path "HKLM:\SOFTWARE\Wow6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection" "DisableRealtimeMonitoring" 1
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Write-Output "Disabling Windows Defender Services"
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Takeown-Registry("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend")
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Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\WinDefend" "Start" 4
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Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\WinDefend" "AutorunsDisabled" 3
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Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\WdNisSvc" "Start" 4
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Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\WdNisSvc" "AutorunsDisabled" 3
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Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Sense" "Start" 4
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Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Sense" "AutorunsDisabled" 3
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Write-Output "Removing Windows Defender context menu item"
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Set-Item "HKLM:\SOFTWARE\Classes\CLSID\{09A47860-11B0-4DA5-AFA5-26D86198A780}\InprocServer32" ""
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Write-Output "Removing Windows Defender GUI / tray from autorun"
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Remove-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" "WindowsDefender" -ea 0
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