computer virus

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(ˈvaɪ rəs)

n., pl. -rus•es.
1. an ultramicroscopic (20 to 300 nm in diameter), metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly bacteria, plants, and animals: composed of an RNA or DNA core, a protein coat, and, in more complex types, a surrounding envelope.
2. a disease caused by a virus.
3. a corrupting influence on morals or the intellect; poison.
4. a segment of self-replicating code planted illegally in a computer program, often to damage or shut down a system or network.
[1590–1600; < Latin vīrus slime, poison; akin to ooze2]
vi′rus•like`, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend: virus - a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computercomputer virus - a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer; "a true virus cannot spread to another computer without human assistance"
malevolent program - a computer program designed to have undesirable or harmful effects
فيروس كمبيوتر
számítógépes vírus
počítačový vírus
References in periodicals archive ?
ESET LiveGrid decreases reaction times to infection waves down to couple of minutes even without regular virus signature updates.
Supplier-certified Windows security patches and virus signature files are distributed from a SecureCentre to the SecureSite at each plant via Shell's existing global network.
ESET will also be providing regular virus signature updates, and customer care support to Windows XP users.
In some cases, it hot half of any customer s machines after they updated to the latest virus signature file.
It also incorporates a security agent, which augments virus signature matching with behavior analysis to identify and prevent malicious threats, adding a layer of protection to both server and desktop computing systems.
The first time I ran it, a message came up to tell me that the virus signature files were out of date and should be updated.
IBM's automated process typically takes less than 5 minutes to identify a virus signature and derive a prescription, the developers claim.
Every time the antivirus researcher, received a new virus, they would analyze the virus and identify a sequence of machine-language instructions that were both unique to the virus and present in every one of its infections; this sequence of bytes is known as a virus signature.
Various software features have a high level of awareness with virus protection and spyware protection topping the list but only 32% are aware of what a virus signature update is.
The ESET Remote Administrator Plug-in for Kaseya VSA gives administrators the ability to deploy antimalware configurations to endpoints with a variety of ESET clients installed, initiate scans and virus signature updates, view threat data and generate reports using the Kaseya Info Center.