Flash per msi zwangsweise entfernen?

$key = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall'  
$key64 = 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall'  
$entries = @()
$entries += gci $key | Get-ItemProperty | ?{$_.DisplayName -like '*Adobe Flash Player*'}  
if ((gwmi win32_operatingsystem).OSArchitecture -eq '64-Bit'){  
    $entries += gci $key64 | Get-ItemProperty | ?{$_.DisplayName -like '*Adobe Flash Player*'}  
}
$entries | %{
    write-host "Uninstalling $($_.DisplayName) ..." -f Green  
    if($_.UninstallString -match 'msiexec.exe'){  
        # msi version installer
        try{
            $guid = [regex]::Match($_.UninstallString,'(\{.*\})').Groups[1].Value  
            Start-Process 'msiexec.exe' -ArgumentList "/X$guid /quiet /qn"  
        }catch{}
    }else{
        # exe version installer
        try{
            $uiexe = [regex]::Match($_.UninstallString,'(?i)^(.*\.exe)').Groups[1].Value  
            Start-Process $uiexe -ArgumentList '-uninstall'  
        }catch{}
    }
}