My Sony Vaio suddenly shut down and when I turn it on, there's only a black screen with a blinking white underscore on the top left, the underscore after 10 seconds moves down a line, then after 10 seconds again moves down a line, then it just stays on the 3rd line. I've tried using my recovery disk and the Bootrec.exe > bcdedit /export C:\bcd_backup > C: > cd boot > attrib bcd -s -h -r > ren C:\boot\bcd bcd.old > bootrec /rebuildbcd > y. But all that doesn't work, I'm accessing internet through Splashtop right now, please help.