Learn more about computer viruses and antivirus protection ?
Learn about Computer Viruses and Anti Virus software
A computer virus is a program ? a piece of executable code ? that has
the unique ability to replicate. Like biological viruses, computer
viruses can spread quickly and are often difficult to eradicate. They
can attach themselves to just about any type of file and are spread as
files that are copied and sent from individual to individual.
In addition to replication, some computer viruses share another
commonality: a damage routine that delivers the virus payload. While
payloads may only display messages or images, they can also destroy
files, reformat your hard drive, or cause other damage. If the virus
does not contain a damage routine, it can cause trouble by consuming
storage space and memory, and degrading the overall performance of your
computer.
Several years ago most viruses spread primarily via floppy disk, but
the Internet has introduced new virus distribution mechanisms. With
email now used as an essential business communication tool, viruses are
spreading faster than ever. Viruses attached to email messages can
infect an entire enterprise in a matter of minutes, costing companies
millions of dollars annually in lost productivity and clean-up expenses.
Viruses won't go away anytime soon: More than 60,000 have been
identified, and 400 new ones are created every month, according to the
International Computer Security Association (ICSA). With numbers like
this, it's safe to say that most organizations will regularly encounter
virus outbreaks. No one who uses computers is immune to viruses.
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How many types of Virus's are there?
What is Malware?
Malware ? short for malicious software ? refers to any malicious or
unexpected program or code such as viruses, Trojans, and droppers. Not
all malicious programs or codes are viruses. Viruses, however, occupy a
majority of all known malware to date including worms. The other major
types of malware are Trojans, droppers, and kits.
Due to the many facets of malicious code or a malicious program,
referring to it as malware helps to avoid confusion. For example, a
virus that also has Trojan-like capabilities can be called malware.
What is a Trojan?
A Trojan is malware that performs unexpected or unauthorized, often
malicious, actions. The main difference between a Trojan and a virus is
the inability to replicate. Trojans cause damage, unexpected system
behavior, and compromise the security of systems, but do not replicate.
If it replicates, then it should be classified as a virus.
A Trojan, coined from Greek mythology's Trojan horse, typically comes
in good packaging but has some hidden malicious intent within its code.
When a Trojan is executed users will likely experience unwanted system
problems in operation, and sometimes loss of valuable data.
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