Question

explain the process of booting in the computer system..
and the use of viruses

Answer 1

it is the process of starting computer system
and viruses are made to harm device..

Answer 2

The process of booting in the computer system
Here it means the start of a computer. Therefore we on the mains than cabinet system (where there is CPU), next we on the monitor. Than the computer takes time to boost up.
The use of viruses
It harms the system.