Installing 1.0.1 strange Error

i'd like do update the evaluation version to 1.0.1.

after the PreReqCheck which is notifying me that this will be a upgrade i click on install and got a error message (german version):

Fehler bei der Anwendung von Transformen. Stellen Sie sicher, dass die angegebenen Transformpfade gültig sind"

We are running Windows Server 2008 sp2 x86 German

...unfortunately i can not upload the screenshot.

i get a sorry...message