After installing Windows Server 2008 to one of my development server I got the following error: Windows could not be activated.
Exact details of error:
Windows could not be activated.
DNS name does not exist.
As it turns out this is problem with volume licensing. You have to activate your Windows by inserting key again (Control Panel –> System). After that activation succeeds. As you can read from Chapter Zero then this error occurs also with Windows Vista.