I woke up this morning and there was a blue screen on my Inspirion 9110. This has happened before, I've shut it off for a while and its been ok. When I tried to restart it there said there was a "Disk Read Error, Ctrl, Alt Del to ReStart." So I hit ctrl, alt, del and it just comes up again. What could be causing this and how do I fix it? I need my computer for college in another week so I need to fix this now.