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Virus
A virus is a self-replicating program, which spreads by inserting copies of itself into other programs or documents. Viruses are designed for all sorts of purposes: they can just cause disruption or irritation to the user of the infected computer, but some have more sinister functions, such as allowing the creator to access personal details on the victim's computer, destroying essential system files, or creating a zombie
computer from which to send spam. Virus comes under the broad umbrella of malware
, which is a term for all sorts of undesirable software which may be installed on a user's computer without their permission.
Viruses can be delivered via email attachments, and are sometimes included in the attachments of spam emails. However, even emails from trusted email addresses could contain viruses, as some viruses are designed to automatically resend themselves to all the contacts in a user's address book.
The problem of virus attacks via email can be combated by using virus scanning settings, as well as by avoiding opening attachments which are not expected, even from trusted email addresses.
Spam - Spam Bayesian Statistical Analysis Heuristics Rules-Based Analysis Distributed Checksum Clearinghouses Black and White Lists HTML Shield Technology Allow List Deny Delivery Junk Mail
Tag Subject Prepend Spam Virus Worm Phishing
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