List Installed Programs on Windows

Get-InstalledProgram.ps1

<#
.SYNOPSIS
    List Installed Programs on Windows
.EXAMPLE
    . ./Get-InstalledProgram.ps1
    Get-InstalledProgram | Export-Csv ~/Desktop/InstalledApps.csv -Encoding UTF8 -NoTypeInformation
.EXAMPLE
    . ./Get-InstalledProgram.ps1
    Get-InstalledProgram -Detail | Format-List
#>
function Get-InstalledProgram() {
    Param (
        [Parameter(Mandatory = $False)]
        [Switch]
        [bool]$Detail
    )

    $paths = @('HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*')

    if (Test-Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\' -ErrorAction SilentlyContinue) {
        $paths += 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*';
    }
    
    if ([System.IntPtr]::Size -eq 8) {
        $paths += 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*';
        if (Test-Path 'HKCU:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\' -ErrorAction SilentlyContinue) {
            $paths += 'HKCU:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*';
        }
    }

    $programs = Get-ItemProperty $paths | Where-Object { $null -ne $_.DisplayName };
    
    if ($Detail) {
        return $programs;
    }

    return $programs | Select-Object DisplayName, Publisher, DisplayVersion | Sort-Object -Unique -Property Publisher, DisplayName
}

# Execute the script directly from URL 
iwr -useb https://gist.githubusercontent.com/akunzai/79ebac57b80fb6bad85e24dabdd93f54/raw/Get-InstalledProgram.ps1 | iex; Get-InstalledProgram | Export-Csv ~/Desktop/InstalledApps.csv -Encoding UTF8 -NoTypeInformation