How to reset Microsoft Defender to Defaults

If for any reason you need to remove the Huntress Managed AV and reset Microsoft Defender to it's defaults you can do it one of these ways:

1Using the GUI

2Using PowerShell

Using the GUI:

Press the Start button and type in "Windows Security"

Select "App settings"

Scroll down to the bottom and click on the "Reset" button.

Confirm the reset by clicking on the second "Reset" button.

Using PowerShell:

# make sure the base options are on
Set-MpPreference -DisableRealtimeMonitoring $false
Set-MpPreference -DisableIOAVProtection $false

# set exclusions to default
$pathExclusions = Get-MpPreference | select ExclusionPath 
foreach ($exclusion in $pathExclusions) {
    if ($exclusion.ExclusionPath -ne $null) {
        Remove-MpPreference -ExclusionPath $exclusion.ExclusionPath
    }
}
$extensionExclusion = Get-MpPreference | select ExclusionExtension 
foreach ($exclusion in $extensionExclusion) {
    if ($exclusion.ExclusionExtension -ne $null) {
        Remove-MpPreference -ExclusionExtension $exclusion.ExclusionExtension
    }
}
$processExclusions = Get-MpPreference | select ExclusionProcess
foreach ($exclusion in $processExclusions) {
    if ($exclusion.ExclusionProcess -ne $null) {
        Remove-MpPreference -ExclusionProcess $exclusion.ExclusionProcess
    }
}

# set scans to default
Set-MpPreference -ScanScheduleTime "02:00:00"
Set-MpPreference -ScanScheduleQuickScanTime "02:00:00"
Set-MpPreference -DisableCatchupFullScan $true
Set-MpPreference -DisableCatchupQuickScan $true
Set-MpPreference -DisableArchiveScanning $false

# packed executable scanning set to enabled
Set-MpPreference -DisableRemovableDriveScanning $false
Set-MpPreference -DisableScanningNetworkFiles $true

# set signatures to default
Set-MpPreference -SignatureUpdateInterval 6
Set-MpPreference -SignatureUpdateCatchupInterval 1
Set-MpPreference -SignatureDisableUpdateOnStartupWithoutEngine $false
Set-MpPreference -SignatureFallbackOrder "MicrosoftUpdateServer|MMPC"

# set advanced options to default
Set-MpPreference -QuarantinePurgeItemsAfterDelay 90