The drive that carries the operating system is obviously one of the most critical hardware components inside your computer. If you've installed Windows on a slow hard drive, it doesn't matter how powerful the other elements like CPU and memory are, the device boots slower loads applications more slowly, and lags very badly when multitasking.
Everybody needs their PC or laptop to be better, and the obvious solution is to go out and buy a new computer or upgrade the components in the device that you actually own. There are many hardware components that can boost a computer's performance, such as an SSD, more or faster memory, or the CPU (Central Processing Unit). Since the processor is a computer's main core, it makes sense for an improved CPU to help improve the overall performance.