I'm looking to permanently install Knoppix as the sole OS on my computer, but when I try to delete my NTFS partition using QTParted, it states that it's mounted/busy and won't let me delete it. When I toy around with the settings, anything I do that looks like it might make a difference only makes the &Delete button no longer highlighted. I don't want to toy around with it too much without advice, because I'm not always 100% sure what I'm doing. How do I unmount it in order to delete it and install Knoppix?