When I get to step 4 of installation process, I'm not being given the option to 'Install Ubuntu alongside Windows 7' (which is the option I want). Instead I'm presented with the option of it being my only operating system or 'Something else'. If I select 'something else' I'm presented with a scary list of options. How do I get to being able to having Ubuntu installed alongside Windows 7?
I have a new Lenovo Thinkpad T430.