What exactly is attacking my computer?

When it comes to security threats,it's no longer as simple as a virus.There are many kinds of malware that attack your

machine.Here is a quick look at what they are and what they do.

Virus

A program that piggy backs on other files,and spread with malicious intent,these are actually uncommon now.
Common sources:public computers,flash memory,LAN
Solution:use a security suite.

Worm

Unlike a virus,a worm can spread without attaching itself to files.It is also programmed to change itself,making variants more

difficult to detect.Some-times worms are updated remotely.
Common sources:LAN,email.
solution:Update the system and anti-virus,use a firewall,track security patches.

Torjan

A trojan is a software that pretends to work for you,but is actually doing something else,being a part of a botnet or allowing for

unauthorised access.
Common sources:torrents,suspicious downloads,websites.
solution:be careful of what you download.

Exploit

An exploit is an inherent"hole"in an operating system or software,that allows malware such as trojans or viruses to spread.
Common sources:The base operating system,installed software(such as office suite)
solution:keep your system and application updated.