What should i do now my laptopsony vaio e series vpce is not starting and a command prompt appears when i start it which says ''error no such partition'' what should you do now?

If its new or youi have warranty check with where you bought it or with sony. If your laptop starts working again check for an update. Thats what caused my ipad to freeze. and also try removing the battery and put it back in after a while. thats the best i could give you