When i turn my computer on I get the windows loading screen, but then it stops and i get a blue screen stating windows detected an error and had to shut down. I ran the diagnostics and i get a hard drive error message saying that the hard drive self test failed. What is going on? My computer was working great then all of a sudden it stopped working. I have a Dell xps m1210 with windows xp media center 2005 sp2. Can someone help me please?