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    Memory of the computer becomes lesser than expected and new files keep appearing
                        with strange names.

                          Warning messages like Your PC is stoned appears or unusual images are automatically
                        displayed on the screen.
                          The operating  system  faces  trouble  in starting up  or the  computer  may  shut  down
                        unexpectedly.

                         Sometimes music and unusual sounds play automatically.

                      Effects of Virus

                         Files become corrupted or the content of the files gets deleted.
                         A virus can damage or destroy the operating system.

                         A virus can reduce the memory space.

                      Types of Computer Virus
                      There are various types of computer viruses that infect the computer in different ways. The
                      most commonly known categories of computer viruses are:

                      Program File Virus

                      A Program file virus, also known as a file-infecting virus, is a type of computer virus
                      that targets and infects executable files (such as .exe, .com, .sys, etc.). When an infected
                      program file is run, the virus code is also executed, which can then spread to other files,
                      corrupt them or make them unusable.

                      Boot Sector Virus
                      A Boot sector virus is a type of computer virus that infects the boot sector of storage
                      devices like hard disks, floppy disks or USB drives. It specifically targets the Master Boot
                      Record (MBR) or the boot sector, which is responsible for loading the operating system
                      during the startup process. Once the system is infected, the virus can spread to other
                      disks that are used with the infected computer. The most commonly known boot sector

                      viruses are Michelangelo and Stoned.

                      Macro Virus
                      A Macro virus is a type of virus that targets and infects documents, particularly files that
                      use macros, such as Microsoft Word or Excel files. When a user opens an infected document,
                      the macro virus is executed, potentially spreading to other documents and affecting the
                      system. The virus may then infect other files by embedding its malicious code into macros
                      within the user's documents. Additionally, some macro viruses do send themselves via

                      email by automatically attaching to messages and sending them to contacts in the user's
                      address book, thus spreading further. Melissa and Bablas are the most commonly known
                      macro viruses.

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