$packageName = "Icinga 2";
$fileType = 'msi';
$silentArgs = '/qr /norestart'
$validExitCodes = @(0)

$packageGuid = Get-ChildItem HKLM:\SOFTWARE\Classes\Installer\Products |
  Get-ItemProperty -Name 'ProductName' |
  ? { $_.ProductName -like $packageName + "*"} |
  Select -ExpandProperty PSChildName -First 1

$properties = Get-ItemProperty HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\$packageGuid\InstallProperties

$file = $properties.LocalPackage

# Would like to use the following, but looks like there is a bug in this method when uninstalling MSI's
# Uninstall-ChocolateyPackage $packageName $fileType $silentArgs $file -validExitCodes $validExitCodes

# Use this instead
$msiArgs = "/x $file $silentArgs";
Start-ChocolateyProcessAsAdmin "$msiArgs" 'msiexec' -validExitCodes $validExitCodes