Virus:
“a segment of self-replicating code planted illegally in a computer program, often to damage or shut down a system or network.”
Viruses by definition are simply computer codes that replicate and cause damage. This can entail just about any kind of infection that can be found on a computer. However, this at one time referred to a more simple infection that did only as the definition states. These days there are so many sub-categories that what most customers know as a “virus” doesn’t even truly exist anymore. For instance, it is very rare to see any user created data damaged by an infection. That means the days of having a word document infected by a virus (for example) are gone. Newer infections may damage or alter other files such as windows system files or other start up programs. These are a fraction of cases, and also the hardest to clean by normal methods.
