It's a bad idea, but it can be done. A Chromebook is built to run web apps, so it generally doesn't have the HDD space or RAM to run Windows or store local files that you would use Windows to build. You can boot from a USB, but I've heard it takes a couple of steps to do so. Also, the keyboard really isn't configured to work with Windows. Again, it's just a bad idea. What specifically do you need Windows for? There might be an app that you can use instead.