Because many mobile devices and personal computers today are continually connected to the internet, securing those devices against computer viruses and is essential for both individuals and businesses.

hackers

Explanation:

If there are two things computers should be protected from - especially if they continually connect to the internet - they are malicious programs such as viruses and their malicious human counterparts - hackers.

Computer viruses are malicious programs that integrate themselves into another program, replicate themselves and cause harms to system programs and resources by altering and/or destroying these programs. These viruses are mainly transmitted and spread by removable media devices and programs downloaded from the internet.

Hackers are unauthorized set of programmers that can break into a system, network and even applications in order to steal, alter or destroy them. The launch malicious programs via the internet into the system or network of systems.