# Script by Timur@0x01337.com
# Date: 2023-11-24
<#
.DESCRIPTION
Hides non-critical Windows notifications.

Requires administrator privileges and restart.

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

.EXAMPLE
PS> .\Hide-Non-Critical-Notifications.ps1

.EXAMPLE
PS> .\Hide-Non-Critical-Notifications.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
}

$regLocation = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications'
$regKey = 'DisableEnhancedNotifications'

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

try {
    Get-ItemProperty -Path $regLocation -Name $regKey -ErrorAction Stop | Out-Null
}
catch {
    Write-Host "Creating property ($regKey) in ($regLocation)"
    New-ItemProperty -Path $regLocation -Name $regKey -PropertyType DWORD -Value '1'
}

try {
    Set-ItemProperty -Path $regLocation -Name $regKey -Value '1'
}
catch {
    Write-Error $_
    exit 1
}

Write-Host "Non-critical Windows notifications now will be hidden. Please restart in order for the changes to take effect"

exit 0