My Windows 8 install will not boot. Sometimes it just looks like it's loading forever, and then eventually either pops up a blue error screen, which goes away too quickly for me to see it, or a black screen, and just sits there. After reboot, it'll say it's "Preparing Automatic Repair. This fails as well, with a screen that goes away too fast for me to see it. I thought I'd try booting from disk, but that doesn't work either, as it appears to take time loading, but ends with a black screen that doesn't load anything.