@XtremeMaC thanks for your reply. no, it doesn't says anything only a lighter blue screen than normal. i havedone many things and i still can solve it, i'll try format again and a clean installation of xpsp2 slipstreamed. about Spinrite: it's a dos utility, works with SATA drives and can repair HD problems but it doesn't have any shareware version so you can not test it until bought