I also tried to change the login and password with the startup DVD. Didn't work. With SuperDuper I made a bootable copy of my internal HD (Tiger) to an external HD. (and also a backup to a second HD) There I upgraded Leopard which all went very well. I selected the upgrade method to keep everything as it was. I've always done this. After restart I'm asked to give my name and password in a small window. Whatever name/password combination I give, nothing works. Even Admin/admin will not work. I assumed that all data was kept from Tiger. How can I now login? I know of a method: start with a blank HD and re-install everything. This is Vista progress. Paul Moortgat