# Script by Timur@0x01337.com
# Date: 2023-11-24
<#
.DESCRIPTION
Disables Cortana

Requires administrator privileges.

.PARAMETER help
Displays a detailed usage description of this script.

.EXAMPLE
PS> .\Disable-Cortana.ps1

.EXAMPLE
PS> .\Disable-Cortana.ps1 -help
#>

# Getting command line parameters
param (
    [parameter(Mandatory = $false)][switch]$help
)

$currentPrincipal = New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())
$isAdmin = $currentPrincipal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
if (!$isAdmin) {
    Write-Error "This script requires administrator privileges"
    exit 1
}

# Writing help message
if ($help) {
    get-help $MyInvocation.MyCommand.Path -Full
    exit 0
}

$registryKeyPath = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Windows Search'
$propertyName = 'AllowCortana'

if (!(Test-Path $registryKeyPath)) {
    Write-Host "Create registry key path ($registryKeyPath)"
    New-Item -Path $registryKeyPath -Force
}

try {
    Get-ItemProperty -Path $registryKeyPath -Name $propertyName -ErrorAction Stop | Out-Null
}
catch {
    Write-Host "Create property ($propertyName) in ($registryKeyPath)"
    New-ItemProperty -Path $registryKeyPath -Name $propertyName -PropertyType DWORD -Value '0'
}

try {
    Set-ItemProperty -Path $registryKeyPath -Name $propertyName -Value '0'
}
catch {
    Write-Error $_
    exit 1
}

Write-Host "Cortana is disabled"
exit 0