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Clear-WindowsInstallerPatchInfo; cleanly/safely remove files from c:\windows\installer
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#based on | |
# - http://blogs.msdn.com/b/heaths/archive/2007/01/31/how-to-safely-delete-orphaned-patches.aspx | |
# - http://www.bryanvine.com/2015/06/powershell-script-cleaning-up.html | |
# - https://p0w3rsh3ll.wordpress.com/2012/01/10/working-with-the-windowsinstaller-installer-object/ | |
clear-host | |
function Get-WindowsInstallerPatchInfo { | |
[CmdletBinding()] | |
Param () | |
$msi = New-Object -ComObject 'WindowsInstaller.Installer' | |
<# didn't need this; all "methods" were actually properties | |
$msi | Add-Member -Name 'InvokeMethod' -MemberType ScriptMethod -Value { | |
$type = $this.GetType(); | |
$index = $args.Count -1 ; | |
$methodargs=$args[1..$index] | |
$type.invokeMember($args[0],[System.Reflection.BindingFlags]::InvokeMethod,$null,$this,$methodargs) | |
} | |
#> | |
$msi | Add-Member -Name 'GetProperty' -MemberType ScriptMethod -Value { | |
$type = $this.gettype(); | |
$index = $args.count -1 ; | |
$methodargs=$args[1..$index] | |
$type.invokeMember($args[0],[System.Reflection.BindingFlags]::GetProperty,$null,$this,$methodargs) | |
} | |
$products = $msi.GetProperty('Products') | |
if ($products) { | |
Write-Verbose "Product Count: $($products.Count)" | |
foreach ($productCode in $products) { | |
Write-Verbose "Product: $productCode" | |
$patches = $msi.GetProperty('Patches',$productCode) | |
if ($patches) { | |
foreach ($patchCode in $patches) { | |
Write-Verbose "Patch: $patchCode" | |
$location = $msi.GetProperty('PatchInfo', $patchCode, 'LocalPackage') | |
Write-Verbose "Location: $location" | |
if ($location) { | |
(New-Object -TypeName 'PSObject' -Property @{ | |
ProductCode = $productCode | |
PatchCode = $patchCode | |
Location = $location | |
}) | |
} | |
} | |
} | |
} | |
} | |
} | |
function Clear-WindowsInstallerPatchInfo { | |
[CmdletBinding()] | |
Param () | |
[string]$installDir = Join-Path -Path $env:windir -ChildPath 'Installer' | |
[PSObject[]]$installerInfo = Get-WindowsInstallerPatchInfo -Verbose | |
[string[]]$itemsOfInterest = $installerInfo | select-Object -ExpandProperty 'location' | |
[string[]]$guidsOfInterest = @($installerInfo | select-Object -ExpandProperty 'productCode') + @($installerInfo | select-Object -ExpandProperty 'patchCode') | |
[PSObject[]]$pathsAndActions = Get-ChildItem -Path $installDir -Recurse | Select-Object -ExpandProperty 'FullName' | ForEach-Object { | |
[bool]$keepPath = if ($_ -in $itemsOfInterest) { | |
$true | |
} else { | |
[string[]]$guids = [Regex]::Matches($_,'\{[0-9A-F]{8}\-([0-9A-F]{4}\-){3}[0-9A-F]{12}\}') | Select-Object -ExpandProperty value | |
if ($guids | Where-Object {$_ -in $guidsOfInterest}) { | |
$true | |
} else { | |
$false | |
} | |
} | |
(New-Object -TypeName 'PSObject' -Property @{ | |
Path = $_ | |
Keep = $keepPath | |
}) | |
} | |
$pathsAndActions | ForEach-Object { | |
if ($_.Keep) { | |
Write-Verbose "Keep $($_.Path)" | |
} else { | |
Write-Verbose "Remove $($_.Path)" | |
Remove-Item -Path $_.Path -Recurse -Force | |
} | |
} | |
} | |
Clear-WindowsInstallerPatchInfo -Verbose |
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