my laptop is so slow that why i want to upgrade from intel pentium dual-core processor T2370 to core i4, i3 or 5i. Is it possible? If it possible what core is appropriate for my laptop? Or if not possible what is the best way to speed up my laptop?
No, it's not possible. For one thing, there's no Core i4, only i3, i5 and i7. For another, they're a different and newer socket.
Chances are good the best improvement in speed will be from replacing your slow mechanical hard drive with an inexpensive solid state drive. Crucial makes good budget SSDs, while Samsung and Intel make better premium ones.
No, it's not possible. For one thing, there's no Core i4, only i3, i5 and i7. For another, they're a different and newer socket.
Chances are good the best improvement in speed will be from replacing your slow mechanical hard drive with an inexpensive solid state drive. Crucial makes good budget SSDs, while Samsung and Intel make better premium ones.
And if possible upgrade the RAM by adding more, or replacing what's already there with higher capacity modules.
No point having more than 4GB though if you're running 32-Windows.
But if you're running 64-bit Windows you can install the maximum that's compatible with your laptop model.
(you can usually get that information from the specs page on the manufacturer's website or in your laptop manual).