Computer_Viruses_Presentationmmmmmmmmm.pptx

Viruses

1. Understanding Computer Viruses Threats and Protections Your Name Date

2. What is a Computer Virus? Definition: A computer virus is a type of malicious software that, when executed, replicates itself by modifying other computer programs and inserting its own code. Basic Function: Viruses can disrupt systems, steal information, or cause other forms of damage.

3. History of Computer Viruses The First Virus: The Creeper virus in the early 1970s. Significant Viruses: Brain (1986), Melissa (1999), ILOVEYOU (2000). Evolution: From simple pranks to sophisticated malware.

4. How Do Viruses Spread? Email Attachments Infected Software Downloads Removable Media (e.g., USB drives) Network Connections

5. Types of Computer Viruses File Infectors Macro Viruses Boot Sector Viruses Polymorphic Viruses Metamorphic Viruses

6. Symptoms of Infection Slow Performance Frequent Crashes Unusual Error Messages Missing or Corrupted Files Unexpected Pop-ups

7. Famous Computer Viruses Melissa Virus (1999) ILOVEYOU Virus (2000) Mydoom (2004) WannaCry Ransomware (2017) NotPetya (2017)

8. Prevention and Protection Install Antivirus Software Keep Software Up to Date Avoid Opening Unknown Email Attachments Regularly Backup Data Use Strong, Unique Passwords

9. Steps to Take if Infected Disconnect from the Internet Run a Full System Scan with Antivirus Software Restore System from Backup Seek Professional Help if Necessary

10. Conclusion Summary: Computer viruses are a significant threat that requires vigilance and proactive measures. Final Thoughts: Stay informed and prepared to protect your digital life.