Functions/Get-InstalledProduct.ps1
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function Get-InstalledProduct { <# .SYNOPSIS Gets information on the installed products. .DESCRIPTION Gets a table of information on the installed products. Each column is one of the possible properties for an installed product on Windows that is also in $Properties. Aliases: gip .INPUTS System.String[] .OUTPUTS System.Object[] .NOTES Author : Dan Thompson Copyright : 2020 Case Western Reserve University #> [CmdletBinding()] [OutputType([System.Object[]])] param( # What property to sort by. Defaults to sorting by DisplayName. # # Aliases: s, sort [Alias('s', 'sort')] [string]$SortBy = 'DisplayName', # Includes products that don't have DisplayName set. This usually isn't very useful. [switch]$IncludeEmptyDisplayName, # Includes products that don't have an uninstall string set. This usually isn't very useful. [switch]$IncludeEmptyUninstallString ) begin { # Determine where to search in the registry. 64 bit Windows uses two registry locations, whereas 32 bit # Windows uses only one. # # Searching the registry directly is also faster than Get-WMIObject, and can also get products that were # not installed from an MSI. $RegistryPaths = @('HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*') if ([System.Environment]::Is64BitOperatingSystem) { $RegistryPaths += 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*' } Write-Verbose -Message 'Searching the following registry locations for installed products:' $RegistryPaths | Write-Verbose } process { $Results = $RegistryPaths | Get-ItemProperty if ([string]::IsNullOrWhiteSpace($SortBy)) { Write-Verbose -Message 'Not sorting by anything.' } else { Write-Verbose -Message "Sorting by $SortBy." $Results = $Results | Sort-Object -Property $SortBy } if ($IncludeEmptyDisplayName.IsPresent) { Write-Verbose -Message 'Including programs with an empty DisplayName.' } else { Write-Verbose -Message 'Excluding programs with an empty DisplayName.' $Results = $Results | Where-Object { -not [string]::IsNullOrWhiteSpace($_.DisplayName) } } if ($IncludeEmptyUninstallString.IsPresent) { Write-Verbose -Message 'Including programs with an empty UninstallString.' } else { $Results = $Results | Where-Object { -not [string]::IsNullOrWhiteSpace($_.UninstallString) } Write-Verbose -Message 'Excluding programs with an empty UninstallString.' } $Results } } New-Alias -Name 'gip' -Value 'Get-InstalledProduct' New-Alias -Name 'Get-InstalledApp' -Value 'Get-InstalledProduct' New-Alias -Name 'Get-InstalledApplication' -Value 'Get-InstalledProduct' New-Alias -Name 'Get-InstalledProgram' -Value 'Get-InstalledProduct' New-Alias -Name 'Get-InstalledSoftware' -Value 'Get-InstalledProduct' |