dürfte dasselbe sein:
"WAU is not in the hidden partition, but a hidden folder in my vaio.
You can check if ur laptop has that.
Click start > windows anytime upgrade > choose your edition (for me ultimate is displayed)> under then upgrade option a message will display whether your laptop is pre-configured for an upgrade.
The above method will only work for any vista version other than ultimate. Because there is no need for the OEM to load WAU in a vista ultimate laptop."
also probier es aus, dann siehst du ob es für das gut ist =)