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Sometime, a macro virus sends itself by attaching with e-mail to the people in the user's address
book. Melissa and Bablas are the most commonly known macro viruses.
E-mail Virus
An E-mail virus is a type of computer virus that transmit from one computer to other through
e-mail messages. Some e-mail viruses can also be transmitted as an infected attachment with
the e-mail message. It gets active into the memory when a user opens an infected e-mail or
attachment. It sounds very simple but an e-mail virus can erase files, destroy information and
cause computer crashes.
How does a Computer get infected with Virus?
Computer viruses spread through several ways. Some of them are:
Using virus infected CDs/Pen Drives.
CD
Opening an infected e-mail attachment.
Pendrive
Downloading an infected program from Internet, Pen Drives, CDs or DVDs.
Running an infected program (which can be a game, screen saver, etc.)
Through local computer networks.
E-mail
How Do You Know Your PC has a Virus?
An infected computer system will:
start displaying unusual messages on the screen. Tech Fact
load the programs late. The first widespread
take more time to shut down the windows. computer virus was
increase the size of the infected files. BRAIN, created in 1986
in Pakistan.
change the file names or types automatically.
How to Prevent a Virus?
Download only legal software.
Don’t open any unknown e-mail.
Don’t open any e-mail attachment from unknown sources.
Don’t download music, program or games from unknown sources on the Internet.
Install an antivirus program in your computer system.
Scan Pen Drive, CD and any other external storage device for viruses before opening in computer.
Let’s CatCh uP
Match the following.
1. Melissa a. Macro Virus
2. Spyware b. First widespread virus
3. Stoned c. Malware
4. BRAIN d. Boot sector Virus
Computer Malware 67

