More often than not, when we are performing some work or research in our personal computer and suddenly we are overwhelmed with anti-virus alerts or even worse, a screen locker virus that is blocking accessibility. In any case, as unimaginable as that sounds, we encounter computer viruses that perform those crippling functions. A computer virus in simple terms referred to as a type of malicious software program that when executed, duplicates by multiplying itself or infecting other computer programs by transfiguring them. Computer viruses usually have some adverse effect on the host computers including corrupting of data, accession of hard disk space, spamming of email contacts, logging keystrokes as well as declaring the computer useless. Remarkably, computer viruses are self-replicating computer programs that install and reinstall themselves without the user concession.

Subsequently, just like the same way viruses require a host cell to replicates itself, computer viruses may not reproduce and spread without programming particular file or documents. The other technical terms, computer viruses are maliciously designed code or program drafted to alter the functionality of a computer to eventually spread to other computers.

Typically a computer virus attaches itself to a legal program or documents that probably support macros so that it can execute its code. The moment a virus successfully attaches itself to a document or file, it would stay dormant until situations cause the computer to administer its code. With that respect, a computer virus would overwhelm your computer the moment one runs the infected program, eventually causing the virus program to be administered.  Incidentally, computer viruses can predominately stay dormant in the computer, but the moment the virus infects your computer alongside other in the network. Further, over the period of time, it is evident that computer virus may spread in several ways, some more pronounced than others. Computer viruses can spread from downloads of the internet; social media scam links, e-mail attachments or removable media. As a matter of fact, computer viruses usually disguise as attachments shared on social platforms such as comical images, special greeting cards or audio as well as video files. 

Meanwhile, there are varying effects of computer viruses manifested on computer system ranging from more pronounced or complex while others are simple. Effect of computer viruses depends on the severity the computer has been infected. In any case, computer viruses impair particular programs and applications leading to the inability of the computer to function or access the programs efficiently. In other instances, the programs may provide incorrect output. On that account, computer viruses may infest the data stored in the hard drive resulting in its crashing. As such, the effect would lead to the formatting of the hard drive. Needless to say, a file is also prime targets for computer viruses and what actually happens is that the viruses modify, delete or even corrupt the files causing inaccessibility of the files. One of the fundamental concepts about computer systems is the level of integrity. With respect to that, computer viruses pose great harm on computer system’s operations thereby jeopardizing its integrity. Subsequently, some computer viruses may not necessarily have an effect on the system integrity but on certain instances consume computer’s memory slowing down the computer. Computer viruses have the capabilities of damaging the BIOS of a system program hard-coded within the motherboard that is bestowed with the responsibility for a more basic function of a computer.