Ok so I was just surfing the web, and all the sudden my computer freezes. It comes up with this black sort of box that says I must restart my computer by holding down the power button or the restart key. So, I do what it says...and now my computer won't boot up. It either freezes right away, or gives me that same pop up screen...and booting up takes forever. What's wrong? Hellllppp. This has been my first problem with my computer and I have had it since the 1st of the year.