O fórum da Microsoft me enviou a resposta; Isso é mais duas horas da minha vida que eu não posso voltar. Obrigado, HP!
De link :
If this is the Zenographics driver that HP has written for many of these class of devices (filenames are Z.....), you will need to uncheck Enable Bidirectional on the ports tab to disable the Zenographics language monitor. It requires access to one of it required files that the remote user does not have access to.