Computer Virus

                                         Computer Virus

Computer Virus:

                   Computer virus is one program or piece of code typically affect on the system such as a corrupting file,destroy itself.

   Following are the different categories of                  viruses:

                    i) Boot Sector virus

                   ii) Macro virus

                  iii) Multipartic  virus

                  iv) TSR virus

                   v) Stealth virus

                    

i)Boot Sector Virus:

•  Its spread using physical media like floppy disks, M.B.R., Hard Drives etc,.
  
•  Booting process means loading the operating system into the main memory.
• This virus replace a some booting files with their corrupted files.
• A boot sector virus is able to infect a computer only if the virus is used to boot up the computer.

ii)Macro Virus:

•  Macro is one special purpose command language.
  
• Macro virus is written in the macro.
• Its made for the sophisticated  program of the Microsoft Office like word,excel  etc,
• Its infect only the documents not executable part of the code.
• 
  

iii)Multipartite  Virus:

• Its computer virus that infect and spread multiple way and it is fast moving virus.
• Most of attack on the boot sector and program files.
  
• It attacks on the boot sector and program simultaneously.

iv)TSR Virus:

• Terminate and Stay Resident virus.
• TSR programs are used in disk operating system and perhaps other non-task operating system.
• TSR virus that steps active in memory after application is completed. 

V)Stealth Virus:

• Its works same as name its hidden from the anti-virus or anti malware.
• Stealth virus eradication requires adv advanced anti-virus or clean system reboot.