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Done by: ANKITA AMRUTSAGAR PRANALI BHERE ROHAN BHOIR ARCHANA KAWALE SANKET MATAL

Computer viruses and antivirus

IndexIntroduction of VirusTypes of Computer VirusesProblem Because of VirusesIntroduction Anti-VirusBest Computer Anti-Viruses Advantages of Anti-Virus

Computer VirusComputer virus is a software program written with malicious intentions.Computer virus is a harmful software program written intentionally to enter a computer without the user's permission or knowledge. There are different types of viruses which can be classified according to their origin, techniques, types of files they infect, where they hide, the kind of damage they cause, the type of operating system, or platform they attack.

Types of Computer VirusesThere are number of computer viruses that can impede the functioning of your computer system.

Types of Computer Viruses

Memory Resident Virus:- These viruses fix themselves in the computer memory and get activated whenever the OS runs and infects all the files that are then opened. Examples: Randex, CMJ, MeveOverwrite Viruses:- The virus replaces the file content. However, it does not change the file size. Examples: Way, Trj.Reboot, Trivial.88.D

Macro Virus:- Macro viruses infect files that are created using certain applications or programs that contain macros, like .doc, .xls, .pps, .mdb, etc These hide in documents that are shared via e-mail or networks.Examples: Relax, Melissa.A, Bablas, O97M/Y2K

Types of virusCompanion Viruses:-companion viruses can wait in memory until a program is run (resident virus), or act immediately by making copies of themselves (direct action virus). These generally use the same filename and create a different extension of it. For example: If there is a file "Me.exe", the virus creates another file named "Me.com" Examples: Stator, Asimov.1539 and Terrax.1069

Boot Sector Virus:-This type of virus affects the boot sector of a hard disk. in which information of the disk itself is stored along with a program that makes it possible to boot (start) the computer from the diskExamples: Polyboot.B, AntiEXE

Problem because of VirusesFormat hard diskCopy, rename and delete filesModify files dates and extensionsDisplay false message every few timesDamage data Damage software

Problem because of VirusesComputer runs slowlyRandom restartsUnknown and uninstalled icons on desktop Icons change in appearanceSystem memory and disk space is reducedNew windows open up at an alarming rateError messages on regular basisFiles mysteriously disappear

Computer Anti-VirusAntivirus software is a computer program that detects, prevents, and takes action to disarm or remove malicious software programs, such as viruses and worms.There are certain types of anti-viruses.

Best Computer Anti-Viruses There are so many anti-viruses which works against viruses but some anti-viruses are trusted and are very famous.

BitDefender Antivirus FEATURES-Security WidgetActive Virus ControlRescue ModeVirtualized BrowserVulnerability ScannerRemote ManagementScan DispatcherPersonal Data FilterChat EncryptionPersonal Data Filter

Norton AntiVirus FEATURES-Keeps you safe when you surf, shop and bank onlineProtects you from social media scamsStops both today's and tomorrow's online threatsBlocks infected and dangerous downloads

AVG Anti-Virus FEATURES-Superior Phishing Protection Link Scanner Checks Websites so You Can Browse Safely Download and share files risk free \Social Networking Protection NEW and unique to AVG

Avast Antivirus

FEATURES-Anti-malwareProtectionSafe ZoneAnti-spamData ShredderWindows Compatible

McAfeeAnti-Virus FEATURES-Security WidgetActive Virus ControlRescue ModeVirtualized BrowserVulnerability ScannerRemote ManagementScan DispatcherPersonal Data FilterChat EncryptionPersonal Data Filter

Advantages of Anti-Virus

Protection from Viruses. The basic aim of an Anti virus is to protect your computer from viruses. An anti virus will prevent you from getting viruses such as trojans, malware and spyware.Gives you protection of Personal Information. A good anti-virus program will protect you while you surf the Internet, preventing hackers from gaining access to personal things such as credit card information and bank account access.

Advantages of Anti-Virus

Protecting Personal Data If you have an anti virus then you dont need to worry about the virus that it will:

Advantages of Anti-Virus

Protecting Personal InformationHackers and viruses go hand in hand. A good anti-virus program will protect you while you surf the Internet, preventing hackers from gaining access to personal things such as credit card information and bank account access. The firewall feature included with most anti-virus software will block any unauthorized incoming connections to your network or computer, preventing hackers from digging their hooks into your life and your computer.