The MPPWTService is a process that starts automatically and belongs to one of the applications released by the T-Systems International GmbH. The T-Systems International GmbH is actually Telekom and based on the signature analysis found on various website, the service is needed for an application that you have installed by them.
However, if you have an antivirus install, perform a quick scan of the Program Files directory, just to be sure that MPPWTService isn't malware related.
