This tutorial explains how to upgrade to Fedora14 from Fedora 13 &12. Because your personal data is the most valuable thing in your computer, before to upgrade it is always a good idea to back up any data that you have on your systems. For example, if you are upgrading or creating a dual-boot system, you should back up any data you wish to keep on your hard drive(s). Mistakes do happen and can result in the loss of all of your data.