Computer viruses are codes written by programmers that replicate within a host computer and spread via electronic contact such as email, downloads, and networking. They can cause serious damage and spread by opening infected email attachments, file transfers, downloading infected programs from the internet or external devices, or using pirated content. Symptoms of a virus include unstable systems, corrupted files, missing programs, unknown programs running, fake anti-virus alerts, slow performance, and crashes represented by the "blue screen of death."

1. Computer Viruses
The Basics

2. What are Computer Viruses?
 Codes written by programmers
 Replicate within the host computer
 Spread via cyber-contact
 E-mail
 Downloads
 Networking
 Can be both malicious or benign
 Have the potential to cause serious damage

3. How do Computer Viruses
Spread?
 Opening infected e-mail attachments
 Accepting file transfers
 Trojan delivery
 Downloading infected programs or files from the
internet, burned discs, USB flash drives, or other
devices

4. How do Computer Viruses
Spread? (cont)
 Downloading or using pirated
programs, images, movies,
music, or other files that are
infected
 Downloading programs that
come with add-ons that contain
viruses
 Infected Computer networks

5. What are the Symptoms?
 Unstable functioning of systems or programs
 Corrupted files and data
 Missing programs or files
 Appearance of unknown programs or files

6. What are the Symptoms? (cont)
 Fake anti-virus pop ups
http://www.gamefreakzweb.com/2010_04_01_archive.html

7. What are the Symptoms? (cont)
 Missing desktop icons
 Operating system fails to boot
 Error messages
 Disk space full
http://blog.superuser.com/2012/02/17/wtfriday-what-happens-when-windows-runs-out-of-disk-space/

8. What are the Symptoms? (cont)
 Programs fail to launch
 Websites are redirected or blocked
 Genuine anti-virus company websites are blocked
 Slow PC speed

9. What are the Symptoms? (cont)
 Operating system crashes
The Blue Screen of Death
http://the-black-wolf-co-uk.deviantart.com/art/The-Blue-Screen-Saver-of-Death-47473826

10. Computer Viruses
Works Cited
Blue Screen of Death. PNG. <http://the-black-wolf-co-uk.deviantart.com/art/The-Blue-Screen-
Saver-of-Death-47473826>
Edison, George. disk_properties. PNG. <http://blog.superuser.com/2012/02/17/wtfriday-what-
happens-when-windows-runs-out-of-disk-space/>
OCAL. Compact Disc 2. Rolera, LLC.PNG. < http://www.clker.com/>
OCAL. Computer Virus Character. Rolera, LLC.PNG. < http://www.clker.com/>
OCAL. Cassette Bones. Rolera, LLC.PNG. < http://www.clker.com/>
OCAL. Firefox. Rolera, LLC.JPG. < http://www.clker.com/>
OCAL. Mail Attachment. Rolera, LLC.PNG. < http://www.clker.com/>
OCAL. USB Thumbdrive. Rolera, LLC.PNG. < http://www.clker.com/>
Saadi. Search. Rolera, LLC.PNG. < http://www.clker.com/>
Tina. Example 1. Game FreakZ. PNG. <http://www.gamefreakzweb.com/
2010_04_01_archive.html>
Tina. Example 3. Game FreakZ. PNG. <http://www.gamefreakzweb.com/
2010_04_01_archive.html>