You’ve (hopefully) caught our guide for installing Windows 8. If you haven’t, go read that. And no matter what you do, don’t install Windows 8 as an upgrade to your existing operating system. There’s a giant list of reasons why you shouldn’t let a Consumer-Preview-cough-beta serve as your primary operating system, the least of which being that it can be a bit confusing for newcomers to try. You’ll shoot your productivity in the foot, not to mention all the potential incompatibilities / bugs / quirks you’ll find in your favorite software, games, and the current “test version” apps found in Windows 8.