16th June 2016

How to uninstall KB-article with powershell remotely

If you get an update that you what to uninstall the best way is to use powershell.

This function uninstalls the kb-article you ask for if it is installed on the system.

To use it you have to run it as administrator.

uninstall-hotfix -computername “replace with name” -hotfixID “Replace with numbers only”

function Uninstall-Hotfix 
{
    [cmdletbinding()]
    param(
        $computername = $env:computername,
        [string] $HotfixID
    )            

    $hotfixes = Get-WmiObject -ComputerName $computername -Class Win32_QuickFixEngineering | Select-Object -Property hotfixid            

    if($hotfixes -match $HotfixID) 
    {
        $HotfixID = $HotfixID.Replace('KB','')
        Write-Host 'Found the hotfix KB' + $HotfixID
        Write-Host -Object 'Uninstalling the hotfix'
        $UninstallString = "cmd.exe /c wusa.exe /uninstall /KB:$HotfixID /quiet /norestart"
        $null = ([WMICLASS]"\\$computername\ROOT\CIMV2:win32_process").Create($UninstallString)            

        while (@(Get-Process -Name wusa -ComputerName $computername -ErrorAction SilentlyContinue).Count -ne 0) 
        {
            Start-Sleep -Seconds 3
            Write-Host -Object 'Waiting for update removal to finish ...'
        }
        Write-Host -Object "Completed the uninstallation of $HotfixID"
    }
    else 
    {
        Write-Host -Object "Given hotfix($HotfixID) not found" -ForegroundColor white -BackgroundColor red
        return
    }
}

function Uninstall-Hotfix

{

[cmdletbinding()]

param(

$computername = $env:computername,

[string] $HotfixID

)

$hotfixes = Get-WmiObject -ComputerName $computername -Class Win32_QuickFixEngineering | Select-Object -Property hotfixid

if($hotfixes -match $HotfixID)

{

$HotfixID = $HotfixID.Replace('KB','')

Write-Host 'Found the hotfix KB' + $HotfixID

Write-Host -Object 'Uninstalling the hotfix'

$UninstallString = "cmd.exe /c wusa.exe /uninstall /KB:$HotfixID /quiet /norestart"

$null = ([WMICLASS]"\\$computername\ROOT\CIMV2:win32_process").Create($UninstallString)

while (@(Get-Process -Name wusa -ComputerName $computername -ErrorAction SilentlyContinue).Count -ne 0)

{

Start-Sleep -Seconds 3

Write-Host -Object 'Waiting for update removal to finish ...'

}

Write-Host -Object "Completed the uninstallation of $HotfixID"

}

else

{

Write-Host -Object "Given hotfix($HotfixID) not found" -ForegroundColor white -BackgroundColor red

return

}

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Damberg