Page 84 - TP_Prime_V2.2_Class7
P. 84

Macro Virus


                  A macro virus is a type of computer virus that is primarily designed to infect a specific type
                  of documents such as Word or Excel files. If we open a macro virus-infected document, the

                  macro virus gets active into the memory and starts infecting other documents. Sometimes,
                  a macro virus sends itself by attaching with e-mail to the people in the user's address book.
           Prime (Ver. 2.2)-VII  An E-mail virus is a type of computer virus that transmit from one computer to other through                                                                                                                           COMPUTER VIRUS
                  Melissa and Bablas are the most commonly known macro viruses.

                     E-mail Virus




                  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,

          82      and cause computer crashes.                                                                                                                                                                                                         83


                    How does a Computer get Infected with Virus?


                  Computer viruses spread through several ways. Some of them are:

                  •   Using virus-infected CDs/Pen Drives.

                  •   Opening an infected e-mail attachment.
                  •   Downloading  an  infected  program  from  Internet,  Pen  Drives,

                    CDs or DVDs.                                                                          E-mail

                  •   Running an infected program (which can be a game, screen saver,
                    etc.)
                                                                                                  Pendrive        CD
                  •   Through local computer networks.


                     How do you know your PC has a Virus?


                  An infected computer system will:

                  •   start displaying unusual messages on              Fun        The first widespread computer

                    the screen.                                         Fact!      virus was BRAIN, created in
                  •   load the programs late.                                      1986 in Pakistan.

                  •   take more time to shut down the windows.

                  •   increase the size of the infected files.

                  •   change the file names or types automatically.
   79   80   81   82   83   84   85   86   87   88   89