Hard drive problem

Hi, I need an immediate help about the hard drive of macbook pro. I want to upload and set up Windows Vista to my computer, but I can not do it because my hard drive gives error. I divided my hard drive into two sections, but I can not unite these sections. How can I overcome this obstacle?

You're going to have to be more descriptive... what kind of error are you getting? Post it here.

In order to restore your hard drive back to one partition you should use the Boot Camp assistant to delete the BC partition. That will restore your drive.
Have you tried that?

Regards.