Antivirus PPt
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A computer virus is a type of malicious software program that can copy itself and spread from one computer to another. Viruses often disguise themselves as legitimate programs or documents to infect users' computers without their knowledge. Once installed, viruses can damage programs, delete files, display unwanted messages, or slow computers by clogging memory. To avoid detection, viruses may kill antivirus tasks before scanning can occur. Antivirus software works by scanning files for known virus signatures and behaviors. It is important to keep antivirus software up to date, avoid opening suspicious email attachments, only download files from trusted sources, and back up files regularly to prevent virus damage.
Antivirus PPt
- 1. Computer VirusArnabSingha, VI CSEVipinBorkar, VI CSE1
- 2. What is a Computer VirusA kind of software programs
- 3. produced by unknown people and harmful to the computers
- 4. Some varieties of these software are the
- 5. Viruses, WormsandTrojan horsesTitleWhat is a Computer VirusThe term “Virus" is often commonly usedto describe all kinds of malware (malicious software)3
- 6. TitleDamages done by VirusesVirusesSometimes display unwanted messages
- 7. Some tend to destroy programs or data
- 8. Clog computer memory and hence sometimes result in system crashes
- 9. Format hard disks, Damage programs, Delete files4
- 10. Damages done by VirusesSimply replicate themselves
- 11. Presents text, video, or audio messages making the user know their presence
- 12. Bug-ridden, and these bugs may lead to system crashes and data loss5
- 13. Virus spreading methodsA viruses can copy itself and infect a computer
- 14. without permission or knowledge of the user
- 15. attaches itself to other software programs or data files6
- 16. Virus spreading methodsSpreads from computer to computer when the host is taken to the uninfected computer
- 17. over a network such as over the Internet or carrying it on a removable medium - a floppy disk, CD, or USB drive7
- 18. Virus spreading methodsMany viruses are existed in the Internet today and new ones are discovered every day.
- 19. spread via downloaded software and data files, and email attachments, etc8
- 20. Virus spreading methodsSome old viruses are installed themselves into the disk boot sector
- 21. runs when the user boot the computer from the disk9
- 22. Virus spreading methodsSome viruses spread through instant messaging
- 23. A virus, in an infected machine, may send a web-address-link as a message to other contacting machines
- 24. Thinking the link is from a friend (a trusted source), the recipient may sometimes follow the link to the website.10
- 25. How Viruses are born?Unlike biological viruses, computer viruses do not simply evolve by themselves…
- 26. deliberately created by programmers, or by people who use virus creation software11
- 27. How Viruses are born?Viruses are written as
- 28. research projects, pranks, vandalism,
- 29. to attack the products of specific companies,
- 30. to distribute political messages,
- 31. and financial gain from identity theft,
- 32. spyware, and cryptoviral extortion. 12
- 33. How Viruses are born?Some virus writers
- 34. consider their creations to be works of art
- 35. See virus writing as a creative hobbyReleasing computer viruses is a crime in most jurisdictions13
- 36. Viruses can avoid detectionTo avoid detection by users, viruses employ different deception methods
- 37. They do not make themselves to
- 38. change the date of last modified
- 41. Viruses can avoid detectionThey kill the tasks associated with antivirus software before it can detect them!!15
- 42. Viruses can avoid detectionThey kill the tasks associated with antivirus software before it can detect them16
- 43. How Antivirus software works?Use a heuristic algorithm to find viruses based on common behaviors
- 44. Examin the content heuristics of the computer's memory (its RAM, and boot sectors)17
- 45. How Antivirus software works?Some anti-virus programs gives you a real time protection
- 46. Examine files as they are being opened, downloaded, copied, accessed, and transmitted etc18
- 47. How Antivirus software works?They need regular updates
- 48. in order to gain knowledge about the latest threats19
- 49. Damage prevention & data recoveringHow to prevent damages caused by viruses?Take regular backups (including OS) on different media, unconnected to the system (most of the time)20
- 50. Damage prevention & data recoveringHow to prevent damages caused by viruses?Use backups on optical media like CD and DVD (read-only), as they can no longer be affected by viruses.
- 51. Use an OS on a bootable, to start the computer if the installed OS become unusable.21
- 52. Keep your computer Virus freeInstall reliable anti-virus software
- 53. the most important step you can take towards keeping your computer clean of viruses
- 54. Update your anti-virus software regularly
- 55. variations of viruses and new ones can be slipped if your software is not current22
- 56. Keep your computer Virus freeGet immediate protection
- 57. Configure your anti-virus software to boot automatically on start-up and run at all times23
- 58. Keep your computer Virus freeDon't automatically open attachments
- 59. ensure that you examine and scan email and other attachments before they run as they might contain viruses
- 60. Scan all incoming email attachments
- 61. Do not open any email attached files if the subject line is questionable, unexpected or the source (address) is unknown, suspicious or untrustworthy 24
- 62. Keep your computer Virus freeDelete chain emails and junk email
- 63. Do not forward or reply to any of them, they clogs up the network
- 64. Some viruses can replicate themselves and spread through email as a chain25
- 65. Keep your computer Virus freeBe careful when downloading files from the Internet
- 66. Ensure that the source is a legitimate and reputable one
- 67. save all downloads to one folder and test them with your own anti-virus software before use26
- 68. Keep your computer Virus freeAlways scan new files for viruses before you use them27
- 69. Keep your computer Virus freeBackup your files on a regular basis28
- 70. Keep your computer Virus freeIf your computer is on a network, make sure you have security steps in place to prevent unauthorized users putting files on your computer .29
- 71. Keep your computer Virus freeTake care using USB flash cards, CDs, zip and floppy disks
- 72. The more computers flash cards, CDs, zip cards and floppies have been used on, the better the chance of a virus infecting them – clean them before use30
- 73. Thank You