11. Computer Security and Antivirus
What is Computer Security?
Computer security is the practice of protecting computers, data, and programs from theft, misuse, loss, or damage.
- Prevents unauthorized access
- Protects sensitive information
- Ensures safe use of computers and the internet
Common Cyber Threats
| Threat | Description |
|---|---|
| Virus | Malicious program that damages files and data |
| Worm | Self-replicating program that spreads automatically |
| Trojan Horse | Malicious program disguised as useful software |
| Spyware | Collects user information secretly |
| Phishing | Fake messages or websites that steal personal information |
Computer Virus
A computer virus is a harmful program that enters a computer without permission and spreads by attaching itself to files or programs.
- Corrupts or deletes data
- Slows down system performance
- May cause system crashes
Antivirus Software
Antivirus software is a program designed to detect, prevent, and remove viruses and other malware from a computer.
| Function | Purpose |
|---|---|
| Scanning | Checks files and programs for threats |
| Detection | Identifies viruses and malware |
| Removal | Deletes or quarantines infected files |
| Protection | Provides real-time security |
Safety Measures for Computer Security
- Use strong passwords
- Install reliable antivirus software
- Update operating system regularly
- Avoid clicking unknown links or emails
- Do not download software from untrusted sources
Computer security and antivirus protection are essential in today’s digital world. They safeguard computers from cyber threats and protect personal and sensitive data. Understanding these concepts is crucial for safe computing, online learning, AI systems, and modern digital life.