Can you upgrade an intel core i3 cpu m 380 to a core i5 or i7. if yes then which one?
Depends, there are two versions of that CPU, one that is BGA and one that is Socketable, if BGA, shit out of luck, if socketed, then you might just be lucky. I wouldn't bet on an i7, but an i5 would maybe do.
BGA = soldered onto the motherboard
Socketed = comes on a socket and the CPU is completely detachable from the motherboard