A computer virus is a malicious piece of code that spreads from device to device and can damage systems or steal data. It replicates like a biological virus, infecting programs and files to disrupt normal functioning or stop a computer altogether. Common ways viruses spread include email attachments, visiting infected websites, and sharing files. Symptoms include slow performance, crashes, and data loss. Antivirus software detects and removes viruses by comparing files to databases of known threats. Basic protection methods involve antivirus software, firewalls, secure browsing, and safe downloading practices.
Computer viruses work by attaching themselves to other programs and replicating when those programs are run. There are different types of malware including viruses, worms, and Trojan horses. Viruses first emerged when personal computers became widespread and people shared software over bulletin boards and floppy disks. Early viruses embedded themselves in executable files or boot sectors to automatically spread. Later, email viruses and worms that exploited security vulnerabilities allowed malware to spread more easily over networks. Spyware is generally not designed to damage computers but can track users and change browser settings without permission. People can help protect themselves by using antivirus software, avoiding unknown programs, and practicing safe web browsing habits.
This document discusses computer viruses, including what they are, the types of viruses, and how to prevent and remove them. It defines a computer virus as a program that can copy itself and infect other applications and files. The main types are boot sector viruses, which infect boot drives; program viruses, which infect executable files; and multipartite viruses, which combine the two. The document also lists some of the top sources of virus attacks and recommends using antivirus software like Norton, McAfee, and Kaspersky to scan for and remove viruses, as well as maintaining regular updates and safe digital practices.
This document provides an overview of computer viruses. It discusses how viruses spread by attaching themselves to files and transferring between computers. Various types of viruses are described like boot viruses, polymorphic viruses, macro viruses, worms, and trojans. Symptoms of a virus infection include slow performance, reduced memory, and files becoming corrupted. The document recommends installing antivirus software, regularly updating it, and being cautious of email attachments to prevent and cure virus infections.
The document discusses viruses and anti-virus software. It provides a 9 point lesson plan on viruses, including what they are, how they spread, their evolution timeline from 1983-2007, statistics on known viruses, the differences between crackers and hackers, and the main types of viruses such as boot viruses, time bombs, worms, and Trojan horses. The goals are to increase knowledge on preventing and combating viruses through behavioral changes.
Viruses can enter computers in several ways. There are many types of viruses including resident viruses, overwriting viruses, macro viruses, polymorphic viruses, and Trojan horses. It is important to take steps to protect computers such as installing antivirus software, using firewalls, avoiding suspicious emails and downloads, and regularly backing up files.
Computer viruses are programs that spread by infecting other programs and files. They spread through infected data or programs copied from one system to another, or through email and internet files. There are different types of viruses like boot sector viruses, file infecting viruses, and program viruses. Viruses can damage systems by corrupting and deleting files, slowing performance, and erasing data. It is important to use antivirus software to scan for and remove viruses, keep backups, and avoid opening unknown files.
1. Computer viruses are programs that can copy themselves and infect computers without permission by attaching to other files or programs.
2. Viruses have existed since the early 1970s and have caused issues like slow performance, crashes, missing files, and unexpected pop-ups.
3. There are many types of viruses including file infectors, macro viruses, and polymorphic viruses that disguise their code, and each can impact computers in different ways such as corrupting files or redirecting web browsers.
This document defines and describes different types of computer viruses. It begins by defining a computer virus as a program that spreads itself by infecting files and disks without the user's knowledge. It then lists and describes 7 common types of viruses: boot sector viruses, multipartite viruses, worm viruses, email viruses, macro viruses, script viruses, and Trojan horses. The document explains how each type infects and spreads. It concludes by emphasizing the importance of prevention through safe computing practices and using virus protection software.
This document discusses computer viruses including their similarities to biological viruses, how they work and spread, types of viruses, virus detection methods, and prevention. It notes that computer viruses can replicate and spread like biological viruses, infecting host systems and slowing them down. The main types discussed are macro, boot sector, worm, Trojan horse, and logic bomb viruses. Virus detection methods covered include signature-based, behavior-based, and heuristic-based detection. Prevention methods recommended are using antivirus software, not sharing drives without passwords, deleting email attachments, backing up files, and using secure operating systems.
This document provides an introduction and overview of computer viruses. It defines computer viruses and explains how they work, discussing how viruses actively infect systems and spread. It categorizes common types of computer viruses such as macro viruses, memory resident viruses, overwrite viruses, and more. Specific virus names are listed as examples for each category. The document also discusses how to protect systems from computer viruses and describes some problems caused by viruses.
This document provides an overview of computer viruses and anti-virus software. It defines what viruses are and how they spread, describes common types of viruses. It then explains what anti-virus software is, how it works to detect and remove viruses, and lists some popular anti-virus programs. It concludes with a brief history of anti-virus software development from the late 1980s onward.
Virus and Anti Virus - Types of Virus and Anti VirusAdeel Rasheed
Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. A virus might corrupt or delete data on your computer, use your e-mail program to spread itself to other computers, or even erase everything on your hard disk.
Computer viruses are malicious programs that can damage systems and erase data. There are different types like viruses, worms, and Trojan horses. Viruses piggyback on other programs to replicate, worms use networks to spread, while Trojans masquerade as useful programs but have hidden harms. Signs of infection include slow performance, crashes, and missing files. Regular antivirus updates, secure practices like avoiding untrusted sources can help prevent damage from viruses.
The document discusses computer viruses and worms, defining them as small software programs that spread from computer to computer (viruses), and programs that replicate over networks by exploiting security vulnerabilities (worms). It describes how viruses can damage systems by corrupting or deleting files, or using email to spread, while worms primarily consume computer resources as they rapidly copy themselves. The document also outlines the dormant, propagation, triggering, and execution phases of how viruses and worms typically operate on infected systems.
Computer virus and anti virus presentationSardar Kaukaz
This document discusses computer viruses including what they are, how they spread and infect systems, the history of viruses, types of viruses, and how to protect systems. It defines viruses as software that can damage data and systems, explains that they make copies to spread quickly without users' awareness, and that the first virus was created in 1971. It notes that viruses spread through removable media, downloads, and email attachments, and that signs of infection include slowed performance, freezing, and error messages. The document also outlines types of viruses and how antivirus software works to detect viruses using virus definitions. It recommends installing and updating antivirus software, scanning external devices, avoiding pirated software, using firewalls, and being cautious with downloads to help
Computer viruses are destructive programs that disrupt normal computer functioning. There are several types of viruses including boot sector viruses, file infector viruses, and macro viruses. Viruses can slow computers down, delete files, crash systems, and corrupt data. They spread by infecting files and devices and are downloaded from unauthorized websites. Symptoms of a virus include slow performance, frequent crashing, and file corruption. People should use antivirus software, avoid unsafe downloads and inserts, and regularly scan their systems to protect against viruses.
This document provides an overview of antivirus software, including what it is, how it works, configuring antivirus programs, symptoms of an infected computer, manually deleting virus files, effectiveness of antivirus software, damaged files, popular antivirus programs, and online antivirus scanning. It discusses how the first antivirus software was developed in 1987 to combat the first computer virus. It also explains how antivirus software uses virus definitions to examine files and remove viruses, worms, and trojans.
Computer viruses are programs that spread from one computer to another and can damage computers. They are often spread through email attachments which run programs that then infect the computer. It's important to have antivirus software installed and to avoid opening suspicious attachments. Once infected, viruses need to be removed as soon as possible using antivirus scanners to prevent further damage.
OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
Virus Operation
How Virus work?
Common Virus Entry Points
Symptoms Of Virus Attack
Types of Computer Virus
Techniques used by Viruses
Anti-Virus Software
Methods used by Antivirus Software
Actions to Prevent Virus Infection
Conclusion
hey...
This PPT is about Computer Virus and its prevention Technique
1. What is computer virus
2. Types of computer virus
3. How to prevent computer from Virus
4. Antivirus
5. Types of antivirus
This ppt is useful for
B.Ed course / MCA/BCA/ BBA/BCOM/MCOM/M.Ed etc.
This document discusses different types of malware like viruses, worms, Trojan horses, and blended threats. It provides definitions and explanations of each type. It also gives advice on how to prevent malware infections through practices like keeping antivirus software updated, not opening email attachments from unknown senders, keeping Windows updated, and using a firewall. The document outlines some signs that a computer may have a virus and provides steps people can take to check for and remove viruses, such as using an online scanner, the Malicious Software Removal Tool, or manually removing viruses by identifying them. It also explains what Data Execution Prevention is and how it helps protect against malware attacks.
Viruses are computer programs that replicate themselves and can damage files or systems. They spread by inserting copies of themselves into other programs or boot sectors. Common virus types include boot sector viruses, macro viruses, multipartite viruses, polymorphic viruses, and email viruses. Antivirus software works by scanning for known virus signatures or unusual activity and quarantining suspicious programs. Regularly updating antivirus software and practicing safe computing habits are recommended to prevent virus infections.
This document discusses malware and how antivirus software works to protect systems. It defines malware as software designed to harm systems without consent. Common types of malware include viruses, trojans, spyware, adware, and rootkits. Viruses can damage data and systems. Antivirus software uses virus definitions and monitors program behavior to identify malware. It provides regular updates to address new threats and scans systems to find and remove malware. Disconnecting systems from networks and running full antivirus scans is recommended if malware is suspected.
The virus then spreads through the software or document that it is connected to via drives, networks, file-sharing applications, or virus-infected attachments to emails.
Read how to turn off malwarebytes notifications
This Presentation explains about Firewalls, Viruses and Antiviruses. I hope this presentation may help you in understanding about Viruses, Firewall and Antiviruses Software.
1. What is a computer security risk?
2. Virus
3. Trojan Horse
4. Worms
5. Stand-Alone Utility Programs
6. How can a virus spread through an e-mail message?
7. How does an antivirus program inoculate a program file
?
8. What is a firewall?
.
This document discusses computer viruses, anti-virus software, and how to prevent virus infections. It defines a computer virus as a program designed to spread from computer to computer and interfere with operations. Viruses are spread through email attachments and downloads. The document outlines different types of viruses and malicious software like worms, spam, and trojan horses. It also describes how anti-virus software works by scanning files and memory for virus signatures. Key recommendations include using anti-virus software, keeping it updated, and exercising caution when opening attachments or downloads.
Computer viruses are small programs that spread from one computer to another and interfere with operations. They are deliberately created by programmers or virus creation software. Viruses enter computers through email attachments, downloads, or infected files on removable drives. Symptoms of viruses include programs taking longer to load, changing file sizes or drive lights flashing unexpectedly. Common types are Trojan horses, worms, and boot sector viruses. Users can avoid viruses by only opening trusted email attachments, backing up files, and using updated antivirus software.
A computer virus is a malicious computer program that can copy itself and spread without permission. It can infect computers by being transferred through email attachments, files on removable drives like USBs, or by exploiting vulnerabilities in network file sharing systems. While some viruses only replicate and spread, others are programmed to damage systems by deleting files or reformatting hard drives. Anti-virus software uses virus signatures and heuristics to detect known and unknown viruses, helping to prevent and remove infections. However, users must still regularly update their software and operating systems to patch new vulnerabilities exploited by viruses.
A computer virus is a malicious program that can replicate itself and spread from computer to computer without permission. It can slow down or damage infected systems. The first computer virus, called "Creeper," was created in 1971. Later viruses caused more harm by deleting files or collecting users' personal data. To avoid viruses, users should only download files from trusted sources, use antivirus software, keep systems updated, and be wary of email attachments from unknown senders. Other malware like spyware and Trojans also pose threats by monitoring users' activities or gaining control of infected devices without consent.
A computer virus is a malicious software program that spreads by copying itself to other computers. It can corrupt or delete data on a computer. Viruses are often spread through email attachments, downloads, and removable media. There are several types of viruses including boot viruses, program viruses, macro viruses, and polymorphic viruses. Symptoms of a virus infection include programs not working properly, critical files being deleted, and the computer running slower. It is important to have antivirus software installed and keep it updated to protect computers from virus infections.
Computer security threats & prevention,Its a proper introduction about computer security and threats and prevention with reference. Have info about threats and their prevention.
Computer Introduction-Lecture04 for applied scince college students, Seiyun University , yemen 2023-2024 Academic year. لطلاب كلية العلوم التطبيقية بجامعة سيئون
مقدمة في علوم الحاسوب المحاضرة الرابعة
Computer viruses are small programs that spread from computer to computer and interfere with operations. They are deliberately created by programmers for reasons like research, pranks, attacks, or financial gain. Viruses typically spread through email attachments, downloads, or infected files on removable drives. Symptoms of infection include slow performance, file changes or damage. People can protect computers by only opening trusted email attachments, backing up files, scanning downloads, and using antivirus software.
A computer virus is a program that infects and disrupts the normal functioning of a computer without the user's permission or knowledge. There are different types of viruses, including program file viruses and boot sector viruses. Symptoms of a virus infection include frequent computer shutdowns and restarts, malfunctioning applications, inaccessible drives, and unexpected error messages. Viruses can spread through removable storage devices, the internet by visiting infected websites or opening email attachments, and through fake antivirus software called "sweepers". It is important to have effective antivirus software installed and keep it updated to detect and remove viruses.
A computer virus is a type of malicious software or malware that attaches itself to other programs and files to replicate itself. Viruses can damage software, steal personal information, slow down systems, and more. Antivirus software uses techniques like on-access scanning, virus definitions, heuristics, and detection testing to identify and remove viruses and other malware from computers. Regularly updating antivirus software and virus definitions is important for protection.
This document discusses computer security issues. It describes how computers can be protected from physical threats like dust, moisture and smoke through proper environment and hardware protections like UPS, surge protection and stabilizers. It also discusses logical security using passwords and backups. The document defines different types of malicious software like viruses, worms and Trojan horses and how they infect computers. It provides details on how antivirus software and firewalls can help combat these threats by detecting viruses and preventing unauthorized access.
A computer virus is a malicious program that can replicate itself and spread from one computer to another without permission. The first known computer virus was called "Brain", discovered in 1986. It infected the boot sector of floppy disks and hard drives, overwriting the master boot record so that the virus's code would run whenever the computer was booted up. Modern antivirus software aims to detect and remove viruses and other malware threats from computers.
Codeavour 5.0 International Impact Report - The Biggest International AI, Cod...Codeavour International
Unlocking potential across borders! 🌍✨ Discover the transformative journey of Codeavour 5.0 International, where young innovators from over 60 countries converged to pioneer solutions in AI, Coding, Robotics, and AR-VR. Through hands-on learning and mentorship, 57 teams emerged victorious, showcasing projects aligned with UN SDGs. 🚀
Codeavour 5.0 International empowered students from 800 schools worldwide to tackle pressing global challenges, from bustling cities to remote villages. With participation exceeding 5,000 students, this year's competition fostered creativity and critical thinking among the next generation of changemakers. Projects ranged from AI-driven healthcare innovations to sustainable agriculture solutions, each addressing local and global issues with technological prowess.
The journey began with a collective vision to harness technology for social good, as students collaborated across continents, guided by mentors and educators dedicated to nurturing their potential. Witnessing the impact firsthand, teams hailing from diverse backgrounds united to code for a better future, demonstrating the power of innovation in driving positive change.
As Codeavour continues to expand its global footprint, it not only celebrates technological innovation but also cultivates a spirit of collaboration and compassion. These young minds are not just coding; they are reshaping our world with creativity and resilience, laying the groundwork for a sustainable and inclusive future. Together, they inspire us to believe in the limitless possibilities of innovation and the profound impact of young voices united by a common goal.
Read the full impact report to learn more about the Codeavour 5.0 International.
This is an introduction to Google Productivity Tools for office and personal use in a Your Skill Boost Masterclass by the Excellence Foundation for South Sudan on Saturday 13 and Sunday 14 July 2024. The PDF talks about various Google services like Google search, Google maps, Android OS, YouTube, and desktop applications.
Lecture Notes Unit4 Chapter13 users , roles and privilegesMurugan146644
Description:
Welcome to the comprehensive guide on Relational Database Management System (RDBMS) concepts, tailored for final year B.Sc. Computer Science students affiliated with Alagappa University. This document covers fundamental principles and advanced topics in RDBMS, offering a structured approach to understanding databases in the context of modern computing. PDF content is prepared from the text book Learn Oracle 8I by JOSE A RAMALHO.
Key Topics Covered:
Main Topic : USERS, Roles and Privileges
In Oracle databases, users are individuals or applications that interact with the database. Each user is assigned specific roles, which are collections of privileges that define their access levels and capabilities. Privileges are permissions granted to users or roles, allowing actions like creating tables, executing procedures, or querying data. Properly managing users, roles, and privileges is essential for maintaining security and ensuring that users have appropriate access to database resources, thus supporting effective data management and integrity within the Oracle environment.
Sub-Topic :
Definition of User, User Creation Commands, Grant Command, Deleting a user, Privileges, System privileges and object privileges, Grant Object Privileges, Viewing a users, Revoke Object Privileges, Creation of Role, Granting privileges and roles to role, View the roles of a user , Deleting a role
Target Audience:
Final year B.Sc. Computer Science students at Alagappa University seeking a solid foundation in RDBMS principles for academic and practical applications.
URL for previous slides
chapter 8,9 and 10 : https://www.slideshare.net/slideshow/lecture_notes_unit4_chapter_8_9_10_rdbms-for-the-students-affiliated-by-alagappa-university/270123800
Chapter 11 Sequence: https://www.slideshare.net/slideshow/sequnces-lecture_notes_unit4_chapter11_sequence/270134792
Chapter 12 View : https://www.slideshare.net/slideshow/rdbms-lecture-notes-unit4-chapter12-view/270199683
About the Author:
Dr. S. Murugan is Associate Professor at Alagappa Government Arts College, Karaikudi. With 23 years of teaching experience in the field of Computer Science, Dr. S. Murugan has a passion for simplifying complex concepts in database management.
Disclaimer:
This document is intended for educational purposes only. The content presented here reflects the author’s understanding in the field of RDBMS as of 2024.
Plato and Aristotle's Views on Poetry by V.Jesinthal Maryjessintv
PPT on Plato and Aristotle's Views on Poetry prepared by Mrs.V.Jesinthal Mary, Dept of English and Foreign Languages(EFL),SRMIST Science and Humanities ,Ramapuram,Chennai-600089
Open Source and AI - ByWater Closing Keynote Presentation.pdfJessica Zairo
ByWater Solutions, a leader in open-source library software, will discuss the future of open-source AI Models and Retrieval-Augmented Generation (RAGs). Discover how these cutting-edge technologies can transform information access and management in special libraries. Dive into the open-source world, where transparency and collaboration drive innovation, and learn how these can enhance the precision and efficiency of information retrieval.
This session will highlight practical applications and showcase how open-source solutions can empower your library's growth.
Demonstration module in Odoo 17 - Odoo 17 SlidesCeline George
In Odoo, a module represents a unit of functionality that can be added to the Odoo system to extend its features or customize its behavior. Each module typically consists of various components, such as models, views, controllers, security rules, data files, and more. Lets dive into the structure of a module in Odoo 17
2. A computer virus is a malicious piece of computer code designed to spread from
device to device. A subset of malware, these self-copying threats are usually
designed to damage a device or steal data
Think of a biological virus
The kind that makes you sick. It’s persistently nasty,
keeps you from functioning normally, and often requires
something powerful to get rid of it.
A computer virus is very similar
Designed to replicate relentlessly, computer viruses infect
your programs and files, alter the way your computer
operates or stop it from working altogether.
What is Virus?
3. What does a computer virus do?
Some computer viruses are programmed to harm your
computer by damaging programs, deleting files, or
reformatting the hard drive. Others simply replicate
themselves or flood a network with traffic, making it
impossible to perform any internet activity. Even less
harmful computer viruses can significantly disrupt your
system’s performance, sapping computer memory and
causing frequent computer crashes.
Do You Know?
First PC virus was created by two Pakistani brothers Amjad Farooq Alvi and Basit Farooq Alvi in 1986. This virus
was called Brain and It was the first PC virus that began infecting floppy disks.
4. How does a computer get a virus?
Even if you’re careful, you can pick up computer viruses through normal Web activities like:
• Sharing music, files, or photos with other users
• Visiting an infected website
• Opening spam email or an email attachment
• Downloading pirated games, toolbars, media players and other system utilities
• Installing mainstream software applications without thoroughly reading license agreements
5. How do computer viruses spread?
The first known infections
from SARS-CoV-2 were
discovered in Wuhan,
China.
It started from one city
and in a short time period,
it was spread almost all
over the world.
6. How do computer viruses spread?
Viruses can be spread several ways:
Networks Discs
Email Attachments
External Storage Devices
According to the U.S. Cybersecurity and Infrastructure Security Agency, infected email attachments
are the most common means of circulating computer viruses.
Most, but not all, computer viruses require a user to take some form of action, like enabling
“macros” or clicking a link, to spread.
7. What are the symptoms of a computer virus?
Your computer may be infected if you recognize any of these malware symptoms:
Slow Computer Erratic Computer Behavior Unexplained data loss Frequent computer crashes
8. How are computer viruses removed?
Antiviruses have made great progress in being able to identify and prevent the spread of
computer viruses. When a device does become infected, though, installing an antivirus
solution is still your best bet for removing it.
Once installed, most software will conduct a “scan” for the malicious program. Once
located, the antivirus will present options for its removal. If this is not something that can
be done automatically, some security vendors offer a technician’s assistance in removing
the virus free of charge.
9. Examples of computer viruses
While tens of thousands of computer viruses still roam the internet, they have diversified their methods and are
now joined by several malware variants like:
A worm is a type of virus that, unlike traditional viruses, usually does not require
the action of a user to spread from device to device..
As in the myth, a Trojan is a virus that hides within a legitimate-seeming program to
spread itself across networks or devices.
Ransomware is a type of malware that encrypts a user’s files and demands
a ransom for its return. Ransomware can be, but isn’t necessarily, spread
through computer viruses.
10. How Does Antivirus Work?
• An antivirus software works by scanning incoming files or code that's being passed through your network traffic.
• Companies who build this software compile an extensive database of already known viruses and malware
and teach the software how to detect, flag, and remove them.
• When files, programs, and applications are flowing in and out of your computer, the antivirus compares them to
its database to find matches. Matches that are similar or identical to the database are isolated, scanned, and
removed.
11. Computer virus protection
• Use antivirus protection and a firewall
• Get antispyware software
• Always keep your antivirus protection and antispyware software up-to-date
• Update your operating system regularly
• Increase your browser security settings
• Avoid questionable Websites
• Only download software from sites you trust.
• Carefully evaluate free software and file-sharing applications before downloading
them.
• Don't open messages from unknown senders
• Immediately delete messages you suspect to be spam