Have just tried to install new unused Vista Ultimate. Clean hd, System previously ran XP. Code on the box is xxxxx-xxx-xxx-xxx and the athentication would not accept this form of input. It did not put the dashes in the correct place. I went to the next step and the authentication was rejected, error report said that the code was already in use. I have continued and installed SP1 as recomended elsewhere. The authentication code now refuses any input after the 6th digit. I have retrieved the key using a key finder utility, and this is of the correct form but still will not authenticate the installation. Any help out there?