I'm currently typing this from my phone because my Vaio model VPCEH15FX will not start. I did a hard shut down after the computer stopped responding, and now I can't do anything. Turning the computer on regularly results in a "Disk read error occurred. Press Ctrl+Alt+Del to restart" message in white letters against a black background. Hitting "Assist" or tapping F10 at start up worked at first, but now just brings me to a black screen with a moveable mouse cursor but nothing to click on. HELP.