So I bought a USB 3.0 Express Card for my Dell Latitude E6420 laptop, and restarted the computer, and after doing so the computer just kept rebooting and rebooting with no end. I did not create an image or a backup, which I should've done. But I don't want to reset my computer at is has a lot of personal data on it! Please I need help on it. What would be a good solution? Thanks!