I have a spare Hard Drive Disk on my computer, I was wondering if I be able to use Ubuntu and be able to boot Window 7 when I want to or I do I have to do something in order for that to happen? I don't want to mess up my computer again.
Please beware im installing Ubuntu on Window 7 not with a CD
Not sure, if I exactly understand your intention. You can have either dual boot of Ubuntu and Windows 7 or you can set up a virtual machine of Ubuntu inside Windows 7 operating system. I guess you want the first.
When you install Ubuntu, the installer will offer you designing dual-booting, so there should be no problems in further use of Windows 7 after that in separate boot session.
Ubuntu is installed either from a CD or from a USB disk.
