Powershell script to get GUIDs for all installed software

Get-InstalledSoftware.ps1

function Get-InstalledSoftware {
    <#
	.SYNOPSIS
		Retrieves a list of all software installed on the system and their corresponding 128-bit Windows GUID.
		
	.PARAMETER Name
		The software title you would like to limit the query to.

	.PARAMETER Format
		The output format for the retrieved software list. Can be 'JSON' or 'XML'.
	
	.EXAMPLE
		Get-InstalledSoftware
		This example retrieves all software installed on the local computer and formats it as JSON.
	
	.EXAMPLE
		Get-InstalledSoftware -Name "Ubuntu" -Format XML
		This example retrieves all software installed on the local computer with a name matching "*Ubuntu*" and formats it as XML.
	
	.NOTES
		Author: DJ Stomp <https://github.com/DJStompZone>
		Date: 07/06/2024
	#>
    [OutputType([System.Management.Automation.PSObject])]
    [CmdletBinding()]
    param (
        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [string]$Name,
        
        [Parameter()]
        [ValidateSet("JSON", "XML")]
        [string]$Format = "JSON"
    )
    $textInfo = (Get-Culture).TextInfo
    $UninstallKeys = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall", "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall"
    $null = New-PSDrive -Name HKU -PSProvider Registry -Root Registry::HKEY_USERS
    $UninstallKeys += Get-ChildItem HKU: -ErrorAction SilentlyContinue | Where-Object { $_.Name -match 'S-\d-\d+-(\d+-){1,14}\d+$' } | ForEach-Object { "HKU:\$($_.PSChildName)\Software\Microsoft\Windows\CurrentVersion\Uninstall" }
    
    $installedSoftware = @()

    if (-not $UninstallKeys) {
        Write-Verbose -Message 'No software registry keys found'
    } else {
        foreach ($UninstallKey in $UninstallKeys) {
            if ($PSBoundParameters.ContainsKey('Name')) {
                $WhereBlock = { ($_.PSChildName -match '^{[A-Z0-9]{8}-([A-Z0-9]{4}-){3}[A-Z0-9]{12}}$') -and ($_.GetValue('DisplayName') -like "$Name*") }
            } else {
                $WhereBlock = { ($_.PSChildName -match '^{[A-Z0-9]{8}-([A-Z0-9]{4}-){3}[A-Z0-9]{12}}$') -and ($_.GetValue('DisplayName')) }
            }
            $gciParams = @{
                Path        = $UninstallKey
                ErrorAction = 'SilentlyContinue'
            }
            $selectProperties = @(
                @{n='GUID'; e={$_.PSChildName}}, 
                @{n='Name'; e={$_.GetValue('DisplayName')}}
            )
            $installedSoftware += Get-ChildItem @gciParams | Where $WhereBlock | Select-Object -Property $selectProperties
        }
    }

    foreach ($app in (Get-AppxPackage)) {
        if (-not $PSBoundParameters.ContainsKey('Name') -or $app.Name -like "*$Name*") {
            $manifest = Get-AppxPackageManifest $app

            if ($manifest.Package.PhoneIdentity.PhoneProductId) {
                $pkgName = $app.name.replace($app.name.split('(.)')[0]+'.', '')

                $appInfo = [PSCustomObject]@{
                    GUID    = '{' + $textInfo.toUpper($manifest.Package.PhoneIdentity.PhoneProductId) + '}'
                    appName = $pkgName
					appId = $app.name
                    appAliases  = $manifest.Package.Applications.Application.Id
                }

                $installedSoftware += $appInfo
            }
        }
    }

    if ($Format -eq "JSON") {
        $installedSoftware | ConvertTo-Json -Depth 3
    } elseif ($Format -eq "XML") {
        $installedSoftware | ConvertTo-Xml -NoTypeInformation
    }
}