NOTE: This article was not written to scare you, but rather to inform you of the dangers of getting a virus. Although it is unlikely that you will ever experience one, the risk is certainly there - we have had many experiences ourselves! Therefore, it is important that you take a moment to learn exactly how to prevent an infection before it occurs!
When it comes to computers, there are two words guaranteed to get a reaction from people ... the first is crash ... and the second is virus! In fact, people work themselves into such a panic when faced with the possibility of a virus, you would think they had been exposed to Eboli!
We've already taken some time to discuss how you can protect yourself against hard drive crashes, so now it is time to tackle the dreaded virus! You see, although computer viruses can do damage, they are not life threatening - there are steps you can take to protect yourself against them!
First, let's make sure we're all on the same wavelength by taking a moment to define what, exactly, a virus is! Viruses are programs that infect other programs by replicating themselves within the other programs. Like their real world counterparts, viruses can also mutate as they are passed from one system to another.
Many viruses don't do a heck of a lot ... or they are so poorly designed that they are almost immediately caught by virus detection software. For example, there are some viruses that are designed to send email to all of your friends saying "Hi!" or "Merry Xmas". That's all they do. They are a virus... a pretty stupid virus... but they do not do much more than cause people to panic!
The panic is caused by the fact that people do not understand what the virus is doing. They imagine all kinds of horrible things including dead and eviscerated hard drives! So, even though some viruses are not intended to do damage, they are still malicious because your computer and your computer programs are being tampered with - without your knowledge or permission!
In some cases, even these so called "harmless viruses" can still do damage because they are often poorly programmed by people who do not fully understand how software and hardware interact. Because these novice virus makers do not know any better, they can potentially do incredible amounts of unintended damage.
However, the really dangerous viruses are those that are purposefully programmed to do damage to your computer! For example, some are programmed to overwrite the files on your hard drive. With these kind of viruses, panic is justified!
Some viruses are programmed to become active when you launch a program ... or on a certain date ... so it not surprising that there were all sorts of nutcases out there who tried their hand at creating a nifty Y2K virus! Other trigger dates are Friday the 13th, Christmas, birthdays of famous people, etc....
Viruses fall into one of several categories, depending on how they are spread.
1. Boot Sector or System Sector Viruses
These viruses attach themselves in your computer's system sectors. System sectors are areas on your hard drive that execute when you boot your computer. These sectors are important for the overall functioning of your computer.2. File Viruses
Viruses are passed by infected floppy disks, not by sharing programs or by executing files. One of the ways you can tell whether or not you are infected with this type of virus is to run "Scandisk" (which is a windows based drive integrity program). Scandisk will scan your entire hard drive (or drives) and notify you if there are any "bad sectors". Multiple bad sectors can mean that you either have a virus, or that your drive is getting old.
This is the most prevalent type of virus, usually infecting common files ( .exe, .com, .sys, .dll, or .bin). When a program is started, the virus begins replicating itself and attaching itself to other programs. The easiest viruses to detect are those that overwrite program files. However, the deadlier viruses are those that slowly alter files, making changes to programs over a period of time.3. Macro Viruses
Macro Viruses attack the templates of your various computer programs. For example, Microsoft Word contains a number of useful templates for resumes, fax cover sheets, etc. The virus is designed to infect the template so that any document created using it will be damaged and infected. As a result, Macro viruses can spread very quickly, as most people do not realize that documents and spreadsheets can be infected.Of course, there are also some other pretty nasty little things that people mistakenly believe to be viruses. These include:
In real life, bombs are not considered to be a threat until someone triggers them. Logic bombs work much the same way... they can sit in your computer for years, twiddling their fingers until something sets them off. This "something" can be a date, the number of times a program is used, the deletion of a particular file, etc. When the bomb is set off, it does something really nasty... it may change bits of data... or delete entire files!2. Worms
Worms can do a great job of gumming up multi-unit networks because they are designed to multiply themselves, using up more and more space on your hard drive... until it's completely full!3. Trojans
In order to wage battle upon the city of Troy, Odysseus hid his Greek troops inside a hollow Trojan horse. The Trojans took the horse as a gift, not aware that it was filled with warriors. This same technique is used by "Trojans", which are usually given to you, disguised as something useful like a program. However, when they arrive on your hard drive, they proceed to declare war!There are also a number of other things that people blame on viruses... even though a virus was nowhere in the vicinity of their system. These fall under the following categories:
Just kidding! What are you doing with your computer in the bathroom anyway? Some places are sacred, don't you know!2. By reading a web page.
There are definitely security issues while on the web, but you cannot get a virus by simply viewing a web page! The way you could get a virus off the web is by downloading a program or file and then executing it. If you download anything from the web, scan it for viruses before you open it!3. By simply opening your email.
You cannot get a virus by simply opening and reading your email. The danger is in the file attachments! There are many email programs that automatically launch applications such as Word, WordPad, or Access when an attachment is received. Although this feature is intended to be "helpful", it can actually be quite dangerous and should be disabled! (The "Help" file of your email program should provide instructions about how this can be done.) You should always be sure to scan any attachments that you receive before opening them - attachments are quite possibly the biggest threat when it comes to viruses! Always be extra careful opening attachments from people you do not know.4. Downloading files.
You will not get a virus by simply downloading a file. However, opening the file or executing a program might! Once again, always be sure to scan anything that you've downloaded into your system. That way, if your anti-virus software says that the file contains a virus, you can simply delete it! No problem!So by now, you might now be wondering about how you CAN get a virus!
Virus Protection Software
| ABOUT THE AUTHOR: Corey Rudl is the owner of four highly successful online businesses that attract more than 1.8 million visitors per month and generate over $6.6 million each year. He is also the author of the #1 best-selling Internet Marketing course online. To check out his site that's JAM-PACKED WITH THE EXACT INFORMATION YOU NEED to start, build, and grow your very own profitable Internet business, I highly recommend visiting http://www.marketingtips.com/tipsltr.html This guy really knows what he's talking about! |