Public/Get-Applications.ps1
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function Get-Applications { <# .SYNOPSIS Sourced from https://mcpmag.com/articles/2017/07/27/gathering-installed-software-using-powershell.aspx Created by Boe Prox .DESCRIPTION Get detailed information on installed applications and their uninstall strings. .PARAMETER Computername For specifying a remote computer to get an application list from .EXAMPLE Get installed software outputted to a table Get-Software | ft .EXAMPLE Get installed software on all online domain joined Endpoints $Computername = get-adcomputer -filter * $computername = Get-Software .EXAMPLE Get installed software on all computers listed in a text file $Computername = get-content c:\computers.txt $computername = Get-Software .Link Uninstall-Application #> [OutputType('System.Software.Inventory')] [Cmdletbinding()] Param( [Parameter(ValueFromPipeline = $True, ValueFromPipelineByPropertyName = $True)] [String[]] $Computername = $env:COMPUTERNAME ) Begin { } Process { ForEach ($Computer in $Computername) { If (Test-Connection -ComputerName $Computer -Count 1 -Quiet) { $Paths = @("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall", "SOFTWARE\\Wow6432node\\Microsoft\\Windows\\CurrentVersion\\Uninstall") ForEach ($Path in $Paths) { Write-Verbose "Checking Path: $Path" # Create an instance of the Registry Object and open the HKLM base key Try { $reg = [microsoft.win32.registrykey]::OpenRemoteBaseKey('LocalMachine', $Computer, 'Registry64') } Catch { Write-Error $_ Continue } # Drill down into the Uninstall key using the OpenSubKey Method Try { $regkey = $reg.OpenSubKey($Path) # Retrieve an array of string that contain all the subkey names $subkeys = $regkey.GetSubKeyNames() # Open each Subkey and use GetValue Method to return the required values for each ForEach ($key in $subkeys) { Write-Verbose "Key: $Key" $thisKey = $Path + "\\" + $key Try { $thisSubKey = $reg.OpenSubKey($thisKey) # Prevent Objects with empty DisplayName $DisplayName = $thisSubKey.getValue("DisplayName") If ($DisplayName -AND $DisplayName -notmatch '^Update for|rollup|^Security Update|^Service Pack|^HotFix') { $Date = $thisSubKey.GetValue('InstallDate') If ($Date) { Try { $Date = [datetime]::ParseExact($Date, 'yyyyMMdd', $Null) } Catch { Write-Warning "$($Computer): $_ <$($Date)>" $Date = $Null } } # Create New Object with empty Properties $Publisher = Try { $thisSubKey.GetValue('Publisher').Trim() } Catch { $thisSubKey.GetValue('Publisher') } $Version = Try { #Some weirdness with trailing [char]0 on some strings $thisSubKey.GetValue('DisplayVersion').TrimEnd(([char[]](32, 0))) } Catch { $thisSubKey.GetValue('DisplayVersion') } $UninstallString = Try { $thisSubKey.GetValue('UninstallString').Trim() } Catch { $thisSubKey.GetValue('UninstallString') } $InstallLocation = Try { $thisSubKey.GetValue('InstallLocation').Trim() } Catch { $thisSubKey.GetValue('InstallLocation') } $InstallSource = Try { $thisSubKey.GetValue('InstallSource').Trim() } Catch { $thisSubKey.GetValue('InstallSource') } $HelpLink = Try { $thisSubKey.GetValue('HelpLink').Trim() } Catch { $thisSubKey.GetValue('HelpLink') } $Object = [pscustomobject]@{ Computername = $Computer DisplayName = $DisplayName Version = $Version InstallDate = $Date Publisher = $Publisher UninstallString = $UninstallString InstallLocation = $InstallLocation InstallSource = $InstallSource HelpLink = $thisSubKey.GetValue('HelpLink') EstimatedSizeMB = [decimal]([math]::Round(($thisSubKey.GetValue('EstimatedSize') * 1024) / 1MB, 2)) } $Object.pstypenames.insert(0, 'System.Software.Inventory') Write-Output $Object } } Catch { Write-Warning "$Key : $_" } } } Catch { } $reg.Close() } } Else { Write-Error "$($Computer): unable to reach remote system!" } } } } |