What Is A Computer Virus - Definition

a computer virus is a program that runs by itself and multiply leaving copies of itself to another program or document on the same hardware or expand into others.
the virus travels with computer programs or archives unnoticed in order to spread, infecting computers as it travels from one to another.
these can spread widely and in a matter of hours.
the expansion of the internet has served as the spread of these unwanted visitors.
some viruses can be perceived only annoying effect more powerful while others can damage even the computer programs in the physical part.
almost all viruses are attached to an executable file, which means that the virus remains dormant your computer until you run it at some point and then begins to affect what it was programmed.
people contribute to the spread of viruses, often without their knowledge, to share filesinfected children or sending e-mails with viruses as attachments in email.
viruses are just one of several types of malware or malicious software.
some viruses have a delayed loading, which is sometimes called pump.
for example, a virus may one day run a certain time or wait until it has infected a number of hosts.
however, the negative effect of viruses is their uncontrolled self-reproduction, which overloads all computer resources.
due to the internet, today worms are more common than viruses.
anti-virus software, originally designed to protect computers against viruses, have been expanded to cover worms and other threats such as spyware.