Computer viruses are self-replicating pieces of malicious software that alter the way your system manages. A subset of malware, pc viruses can destroy files, infect programs and devices and interrupt ordinary functions. They can also spread from machine to equipment, causing mass infections. A few types of computer infections can even assail and kill entire pc networks.
Just like biological viruses, which need to hitch a ride on cells to repeat and get spread around, computer infections spread by attaching themselves to naive files or documents, this sort of because emails or downloaded papers. They then start when the file is opened up or seen, executing and infecting other documents in the process.
Virus writers happen to be motivated by a variety of factors. Some are ego-driven and search for fame in the hacker community by crafting destructive infections, while others could use them for cybercrime, ransomware goes for or to gain access to corporate networks to conduct cyber espionage.