HP Pavilion w. Vista, am trying to open Ubuntu for

First of all, try this:
Username: root
Password: root

Second of all, you only specified that you had Vista. If you manually installed Ubuntu, then you must've specified a Username and Password during the setup.

If none work, then go ahead and format the Ubuntu partition, then re-install Ubuntu. This time, try to remember the Username and Password.

Hi,

I think the program just wants a registred user name and password, if not than try to deinstall, reboo, reinstall, reboot again, and it might just work then, but that really isn't a decent solution but it might work...
yet i have to admit i have too little experience with ubuntu to answer this like it should... but...

Hope this is useful, and greetings,

Olivier.