2.CPU can consider replacing i5-2540M or i7-2640M which are both TDP 35W, the former is around 60 yuan, and the latter is 160 yuan (uneconomical).
3. You can add a 4GB DDR3- 1333 to the memory, or unplug the original 2GB and replace it with two 4GB DDR3- 1333. A 4GB DDR3- 1333 notebook memory is about 35 yuan.
4. The hard disk can be replaced by a solid-state hard disk with larger capacity, or if there is extra hard disk space, you can add another solid-state hard disk and install the system in the solid-state hard disk. The experience should be much better.
5. There is nothing to exchange for the rest.