Public/Get-MsiPatch.ps1
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function Get-MsiPatch { <# .SYNOPSIS Scans the "C:\Windows\Installer" directory for all installed and orpaned msp files. .DESCRIPTION Office installations can leave behind a large amount of orphaned patches which can take up many GBs of disk space. Using the "Get-MSIPatchInfo" cmdlet from the "MSI" module we can determine which msp files are currently installed. From there we can calculate the amount and size of the orpaned msp files. .EXAMPLE Get-MsiPatch This will display a PsCustomObject of all msp files and size, which are installed and size, and which are orpaned and their total size. .EXAMPLE Get-MsiPatch -Verbose Same as above only verbose information is displayed for each msp detailing whether they are installed or orphaned. .EXAMPLE Get-MsiPatch | FT Simply changes the format to a table view of the object. .NOTES Author: Mark Kerry Date: 08/01/2018 #> [CmdletBinding()] Param() # Begin by checking the user in running the function from elevated priviledges if (-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) { Write-Warning "You need to run this script from an elevated PowerShell prompt!`nPlease start PowerShell as an Administrator..." break } if ($PSVersionTable.PSEdition -eq 'Core') { Write-Warning "This function is not compatible with PowerShell Core as it reiles on the MSI module binaries." break } # Get each .msp in the Installer directory and calculate the size. $allMsp = Get-Item -Path C:\Windows\Installer\*.msp | Measure-Object -Property Length -Sum $allMspSum = "{0:N2}" -f ($allMsp.sum / 1GB) + " GB" # List all msp files in %windir%\Installer and convert to string $strAllMsp = Get-ChildItem -Path C:\Windows\Installer\*.msp | Select-Object Name -ExpandProperty Name # List all currently installed msp files and convert to string $strInstalledMsps = Get-MSIPatchInfo | Select-Object LocalPackage -ExpandProperty LocalPackage # Create a new array of all the installed msp files but run a regex query to strip the path from the string so the format is the same as the strAllMsp variable $array = @() foreach ($Msp in $strInstalledMsps) { $a = $Msp -creplace '(?s)^.*\\', '' $array += $a } # Remove any duplicate values from the array $array = $array | Select-Object -uniq # Now list both installed and Obsolete msps $inCount=0 $obCount=0 $inst = @() $obinst = @() foreach ($x in $strAllMsp) { if ($array.Contains($x)) { Write-Verbose "$x is installed." $inst += $x $inCount++ } else { Write-Verbose "$x is obsolete and can be moved/deleted." $obinst += $x $obCount++ } } # Scan for each installed msp and calculate the total size of them all. Write-Progress -Activity 'Retrieving installed msp files...' -Status '33% Complete.' -PercentComplete 33 $size = $null foreach ($i in $inst) { $instSize = Get-ChildItem -Path C:\Windows\Installer | Where-Object {$_.Name -like $i} | Select-Object Length -ExpandProperty Length $size += $instSize } $TotalInst = "{0:N2}" -f ($size / 1GB) + " GB" # Scan for each obsolete msp and calculate the total size of them all. Write-Progress -Activity 'Retrieving orphaned msp files...' -Status '66% Complete.' -PercentComplete 66 $obsize = $null foreach ($o in $obinst) { $obinstSize = Get-ChildItem -Path C:\Windows\Installer | Where-Object {$_.Name -like $o} | Select-Object Length -ExpandProperty Length $obsize += $obinstSize } $TotalOb = "{0:N2}" -f ($obsize / 1GB) + " GB" # Display them all in a PsCustomObject [PsCustomObject]@{ TotalPatchCount = $allMsp.Count TotalPatchSize = $allMspSum InstalledPatchCount = $inCount InstalledPatchSize = $TotalInst OrphanedPatchCount = $obCount OrphanedPatchSize = $TotalOb } } |