I installed Ubuntu on my computer recently but have had difficulty actually using Ubuntu. I choose the Ubuntu selection after restarting, which then gives me four sub-selections, two for Ubuntu and two for Windows 7. I've chosen each selection but each time I reach the user accounts section, it asks for a password. I put in my normal user account pass and it says "Authentication Failed." I restarted the computer and used Windows 7 again to disable my password. Once I was sure the password was removed, I restarted the computer again and tried each sub-selection again. It gave me the same issue of asking for a password I didn't have. Is there any way to resolve this?