I used the version of ubuntu that allows you to install through windows. When I start my system it asks me if I want to select Ubuntu or Windows 7. No problem, but I wanted to dual boot by giving ubuntu 250 gb and keep 2500 gb for my windows. The only problem is I am afraid that if I install Ubuntu on my machine and use the new partition I created that I will not actually be able to boot into it(because I already have a version installed)
Also, if I just install Ubuntu from an iso will it let me select which system to boot into, or am I better off to leave it how it is now?