How to improve computer performance

Nowadays a large number of people use computers for different purposes such
as games, work, listening to music, watching videos, making presentations etc.
However, while operating a computer, most users often have to cope with the low
performance of their machines. And as some people do not know how to optimize the
computers, they buy a new one, even more expensive, thinking that it will solve the
problem. In this case basic knowledge of computer optimization can save both time
and money.