As I said in my first post, I am ALWAYS logged as Administrator. This is why I am a bit sick of Adobe telling me I am not.
I go to Systemsteuerung to verify this: to Benutzerkonten und Jugendschutz -> hinzufügen/entfernen to verify that I am indeed logged in by my name, which also happens to be as Administrator.
Although this the Home version of Vista for my own personal use, as a precaution I have created a login name - which is also The Administrator. It always works whenver another program requests Administrator's permission - so what IS the problem here??