Recently given a laptop with Ubuntu 12.1 installed alongside Windows 7. Can only access Ubuntu, which is fine for everyday use (LibreOffice, Firefox, etc.) but there's an authentication password required to install the 500+ updates, and when trying to run anything in terminal, it asks for "quiz's" password. It won't allow me to go into root mode to bypass the password (if that's even a real thing?). I'm completely new to Linux, but am fascinated at the capabilities and would like to mess around some more, but keep getting stopped by these passwords. What do I have to do? Uninstall and re-install? How does one do that if I don't even have access to the Windows 7 OS because it is password protected as well? Thanks in advance for any information and help.