PowerShell: How to find and uninstall a MS Office Update

I've been hunting for a clean way to uninstall an MSOffice security update on a large number of workstations. I've found some awkward solutions, but nothing as clean or general like using PowerShell and get-wmiobject with Win32_QuickFixEngineering and the .Uninstall method on the resulting object.

[Apparently, Win32_QuickFixEngineering only refers to Windows patches. See: http://social.technet.microsoft.com/Forums/en/winserverpowershell/thread/93cc0731-5a99-4698-b1d4-8476b3140aa3 ]

Question 1: Is there no way to use get-wmiobject to find MSOffice updates? There are so many classes and namespaces, I have to wonder.

This particualar Office update (KB978382) can be found in the registry here (for Office Ultimate):

HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\{91120000-002E-0000-0000-0000000FF1CE}_ULTIMATER_{6DE3DABF-0203-426B-B330-7287D1003E86}

which kindly shows the uninstall command of:

msiexec /package {91120000-002E-0000-0000-0000000FF1CE} /uninstall {6DE3开发者_JAVA技巧DABF-0203-426B-B330-7287D1003E86}

and the last GUID seems constant between different versions of Office.

I've also found the update like this:

$wu = new-object -com "Microsoft.Update.Searcher"

$wu.QueryHistory(0,$wu.GetTotalHistoryCount()) | where {$_.Title -match "KB978382"}

I like this search because it doesn't require any poking around in the registry, but:

Question 2: If I've found it like this, what can I do with the found information to facilitate the Uninstall?

Thanks

Expanding on your second approach (using Microsoft.Update.Searcher), this solution should allow you to search for an update by Title then uninstall it:

$TitlePattern = 'KB978382'

$Session = New-Object -ComObject Microsoft.Update.Session

$Collection = New-Object -ComObject Microsoft.Update.UpdateColl
$Installer = $Session.CreateUpdateInstaller()
$Searcher = $Session.CreateUpdateSearcher()

$Searcher.QueryHistory(0, $Searcher.GetTotalHistoryCount()) | 
    Where-Object { $_.Title -match $TitlePattern } |
    ForEach-Object {
        Write-Verbose "Found update history entry $($_.Title)"
        $SearchResult = $Searcher.Search("UpdateID='$($_.UpdateIdentity.UpdateID)' and RevisionNumber=$($_.UpdateIdentity.RevisionNumber)")
        Write-Verbose "Found $($SearchResult.Updates.Count) update entries"
        if ($SearchResult.Updates.Count -gt 0) {
            $Installer.Updates = $SearchResult.Updates
            $Installer.Uninstall()
            $Installer | Select-Object -Property ResultCode, RebootRequired, Exception
            # result codes: http://technet.microsoft.com/en-us/library/cc720442(WS.10).aspx
        }
    }