"system windows screen is going then suddenly go to blue screen the error was in-access boot device, and also i cant enter to safe mode also, i didnt install any hardware or software recently"
OMG! we have exactly the same problem! see my post
here. when did you start having this problem? i had it yesterday after my firewall/virus scan went down. do you use a router? coz i do & im thinking it might be involved =(