I have just installed Ubuntu 12.10 after trying it on a usb stick which worked fairly well.
But currently I am not able to install anything because every time I want to do something I'm prompted to enter a password and even when I provide the correct password I can't change anything!
Biggest problem is to activate the wireless driver! I could not enable the driver and I'm not able to connect to the internet now!
Please help me to deactivate the authentication.