Malware [general term] - software designed to secretly access a computer system without the owner’s informed consent. (Wikipedia)
Computer Virus [a type of malware] - a computer program that can copy itself and infect a computer…. A true virus can spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive. (Wikipedia)
Computer Worm [a type of malware] - a self-replicating malware computer program. It uses a computer network to send copies of itself to other nodes (computers on the network) and it may do so without any user intervention. (Wikipedia)
Trojan Horse [a type of malware]- appears to perform a desirable function for the user prior to run or install but instead facilitates unauthorized access of the user’s computer system… The term is derived from the Trojan Horse story in Greek mythology. (Wikipedia)
Spyware [a type of malware] – can be installed on computers and collects little bits of information at a time about users without their knowledge. (Wikipedia)
Adware (advertising-supported software) [can be classified as or can come tied to spyware] - any software package which automatically plays, displays, or downloads advertisements to a computer. These advertisements can be in the form of a pop-up… Adware, by itself, is harmless; however, some adware may come with integrated spyware such as keyloggers and other privacy-invasive software. (Wikipedia)
Keylogging [sometimes a type of spyware] - the action of tracking (or logging) the keys struck on a keyboard, typically in a covert manner so that the person using the keyboard is unaware that their actions are being monitored. (Wikipedia)
Trojans are regarded as some of the most troublesome issues in the realm of computer security because a hacker who has planted a Trojan horse on your computer has likely granted himself remote access to watch or control your computer. Since they can slip onto your computer nearly undetected (without adequate security software running), these malicious software live up to their name, without a doubt.
With many different types of malicious software (malware) readily available, proper protection is crucial. Note that the terms I’ve listed above only scratch the surface of the kinds of malware and existing information on these malware. Above, I’ve outlined a basic tree of computer threats, starting with the broad umbrella term, “malware,” and listing some types of malware, followed by some types of “spyware,” which are also a type of malware. Some of these seem like common sense, and they are, but there are intricate differences between them that make each threat a unique problem to be dealt with specifically.
Luckily, there actually is a nearly “end all, be all” answer in that various programs referred to as “Internet Security” suites are available, of high quality and not terribly expensive. Beyond programs labeled solely as antivirus, Internet Security suites protect your computer(s) from viruses, spyware, Trojans, adware, and other internet, email and network vulnerabilities. Check out this review sheet of the Top 10 Internet Security Suites for 2011, which incorporates a thorough analysis of the necessary internet security components. I had been using ESET Smart Security for a year on my desktop, but since my Eee PC netbook works much better with the sleek Trend Micro Internet Security, and since Amazon was offering a three-PC download of the latest Trend Micro Internet Security for less than $20, I switched to Trend Micro and would certainly recommend it. Any of the programs listed in the aforementioned Top 10 sheet will serve you well, so no worries.
Ultimately, the specific settings you place on each of your computers’ security suites are up to your taste and schedule. I, for the sake of my personal information and for my business and clients, have my security programs run every single day, but a lesser-used computer may only need weekly scans. I also have my desktop scanned at a time when I am not around each day, and my laptop is scanned around 5am, when I am surely not awake and won’t interrupt it. A schedule that doesn’t conflict with your computer usage is best because the scan could put a strain on your computer’s performance if you’re trying to work or surf the internet at the same time.
Not unlike our teenage years, the threats we face today require a conscious protection effort. Safeguarding ourselves from Trojans, as well as viruses, worms and others, is a fairly simple process that we easily take for granted.