Internal/Get-InstalledApplication.ps1
Function Get-InstalledApplication { <# .SYNOPSIS Retrieves information about all installed applications. .DESCRIPTION Retrieves information about all installed applications by querying the registry. Returns information about application publisher, name & version, product code, uninstall string, install source, location, date, and application architecture. .EXAMPLE Get-InstalledApplication #> [OutputType([System.Object[]])] [CmdletBinding()] param() [string[]]$regKeyApplications = 'HKLM:SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall','HKLM:SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall' ## Enumerate the installed applications from the registry for applications that have the "DisplayName" property [psobject[]]$regKeyApplication = @() ForEach ($regKey in $regKeyApplications) { If (Test-Path -LiteralPath $regKey -ErrorAction 'SilentlyContinue') { [psobject[]]$UninstallKeyApps = Get-ChildItem -LiteralPath $regKey -ErrorAction 'SilentlyContinue' ForEach ($UninstallKeyApp in $UninstallKeyApps) { Try { [psobject]$regKeyApplicationProps = Get-ItemProperty -LiteralPath $UninstallKeyApp.PSPath -ErrorAction 'Stop' If ($regKeyApplicationProps.DisplayName) { [psobject[]]$regKeyApplication += $regKeyApplicationProps } } Catch{ Write-Warning "Unable to enumerate properties from registry key path [$($UninstallKeyApp.PSPath)]." Continue } } } } ## Create a custom object with the desired properties for the installed applications and sanitize property details [psobject[]]$installedApplication = @() ForEach ($regKeyApp in $regKeyApplication) { Try { [string]$appDisplayName = '' [string]$appDisplayVersion = '' [string]$appPublisher = '' ## Remove any control characters which may interfere with logging and creating file path names from these variables $appDisplayName = $regKeyApp.DisplayName -replace '[^\u001F-\u007F]','' $appDisplayVersion = $regKeyApp.DisplayVersion -replace '[^\u001F-\u007F]','' $appPublisher = $regKeyApp.Publisher -replace '[^\u001F-\u007F]','' ## Determine if application is a 64-bit application [boolean]$Is64BitApp = If (($is64Bit) -and ($regKeyApp.PSPath -notmatch '^Microsoft\.PowerShell\.Core\\Registry::HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node')) { $true } Else { $false } $installedApplication += New-Object -TypeName 'PSObject' -Property @{ UninstallSubkey = $regKeyApp.PSChildName ProductCode = If ($regKeyApp.PSChildName -match $MSIProductCodeRegExPattern) { $regKeyApp.PSChildName } Else { [string]::Empty } DisplayName = $appDisplayName DisplayVersion = $appDisplayVersion UninstallString = $regKeyApp.UninstallString InstallSource = $regKeyApp.InstallSource InstallLocation = $regKeyApp.InstallLocation InstallDate = $regKeyApp.InstallDate Publisher = $appPublisher Is64BitApplication = $Is64BitApp } } Catch { Write-Error "Failed to resolve application details from registry for [$appDisplayName]. $($_.Exception)" Continue } } Write-Information "Found $($installedApplication.Count) Apps." return $installedApplication } # 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