virtualbox.org

I downloaded virtualbox and loaded windows 7 it installed fine but when I opened windows it was fully maximized but still only occupying a very small space. I want to use windows to play games and I am afraid the screen will be too small. Also since I have a very large hard drive I might want to use bootcamp and make a NTFS partition. The reason I installed virtualbox in the first place was to get windows running. After I did this after several attempts Apple told me I could make a NTFS file for the partition. When I went to uninstall I entered y and hit enter and the uninstall aborted. What could be the problem? Do I need to uninstall windows first or will uninstalling virtualbox also uninstall windows?

Thanks,
Bill