Recently, there are a number of friends to ask me how to Speed up their old computer. They are willing to pay a small amount of money to upgrade their hardware.
1. I will find some more RAM, at least, upgrade to 4GB, Ideally, 8GB is the best
2. If they are willing to pay, I will upgrade their OS hard disk in SSD,

If they are not possible, I will just ask install "Linux"!