add_or_remove_folder_to_windows_defender_exclusions.ps1

# This script will ask you to enter a folder path
# DO NOT wrap the folder path in quotes

Write-Host
Write-Host "Add or Remove a folder in Windows Defender's exclusion list"
Write-Host

$FolderPath = Read-Host "Enter a folder path without quotes"

$ShowExclusions = {
    Invoke-Expression "Clear-Host; Write-Host"
    Write-Host "Current Excluded Folders"; Write-Host
    Get-MpPreference | Select-Object -Expand ExclusionPath
    Write-Host; Read-Host "Press Enter to exit"
    Invoke-Expression "Clear-Host; Write-Host"
}

Invoke-Expression "Clear-Host; Write-Host"

Write-Host "Add or Remove: $FolderPath"
Write-Host
Write-Host "[1] Add"
Write-Host "[2] Remove"
Write-Host "[3] Exit"
Write-Host

$myChoice = [int](Read-Host "Enter a number")

If ($myChoice -eq "1") {
    Add-MpPreference -ExclusionPath $FolderPath
    &$ShowExclusions
}

ElseIf ($myChoice -eq "2") {
    Remove-MpPreference -ExclusionPath $FolderPath
    &$ShowExclusions
}

ElseIf ($myChoice -eq "3") { Invoke-Expression "Clear-Host; Write-Host" }