Viruses have long been haunting the human society. They not only paralyze you but also your computers, though differing in origin. And, this can be quite an annoying experience for you.

“Some computer viruses have the power to crash hard drives of your systems”.

According to experts, viruses like Melissa, Trojan horses and Mydoom worm had unbelievable devastating effects. These are a just a few examples of the deadly computer viruses and many more exist.

What is a Virus

Virus, essentially, is a piece of code that is written to penetrate into your computer and cause harm. But how does computer virus actually contaminate your system? There are a number of ways through which computer viruses spread, like opening infected e-mail messages, attachments, running an application by either downloading or copying from a compact disc (CD).

Some viruses are also hidden in JavaScript or HTML code in a website. Whenever you open an infected file, the virus becomes active and hunts the computer programs for infection, depending on their purpose of programming.

Types of Computer Viruses


There are various types of computer viruses.

Resident Viruses:

Resident viruses are those that attack a computer’s memory. So whenever a computer is powered on, the virus automatically gets activated hence spreads to various applications causing harm.

Non Resident Viruses:

The other type of computer viruses are non resident viruses. The non resident viruses are made up of two processes, one for figuring out the position of files and another meant to duplicate them.

Boot Sector Viruses:

Boot sector viruses enter a computer via floppy disks to harm the computer’s hard drive. Every time you use the floppy disk, it becomes infected.

Macro viruses:

Macro Viruses are written for computer applications like Outlook, Excel and Word. In case you open an infected file, the program will become infected. With this, the virus also spreads to any other opened document inside the program. Then, there are e-mail attachments which are infected. If you open the infected attachment, the virus enters the e-mail application and starts sending mails to the ones mentioned in your address book.

Protect your computer against viruses – Road to your security system


“Prevention is Better then Cure”

Coming to the most important part, protection and prevention against computer viruses! . If a computer user carries out the following steps then he might prevent computer virus intrusions within his system hence protecting his computer.

In case you get suspicious mails with .exe or .dll – file format then these are executable files. It is highly advised not to open any executable file received through email. E-mails received from unknown sources also should not be opened.

It is advisable that you have a good antivirus installed within your system. Also, you should keep on updating it. Almost all anti-viruses come with an initial trial version. But be sure not to keep on using the trial versions of different antivirus programs with intention to save a few bucks. It could cost you a lot in the long run, perhaps to the extent of purchasing a new laptop or palmtop or desktop. Instead, once you get content with the trial version of your chosen antivirus, switch on to the paid version. It guarantees a lot more protection than the trial one.

Necessity of Antivirus program for Risk Group


People who frequently shop online are at high risk of computer virus attacks. It is necessary for them to have an advanced antivirus so that they shop securely. If you are a Microsoft Windows user, you should frequently keep on updating your system with the automatic updates turned on. These updates fix security loopholes used by viruses to infect Microsoft Windows.

In short, every user who uses the keyed device needs to get good protection against virus. An updated and genuine antivirus might not cost a fortune, but it would definitely promise a longer life to your computer.

About the author: Alia Haley is a blogger by profession and is deeply in love with gadgets.