Navodaya Class 7 Computer Notes – November Month

In this article we provide information regarding latest Navodaya Class 7 Computer Notes – November Month TGT Computer Science (CS) 2025-26.

Navodaya Class 7 Computer Notes – November Month

We are using source for Syllabus – Navodaya Vidyalaya Samiti Perspective Academic Planning Split of Syllabus 2025-26.

We are giving to the Point Notes for the Students.

Thanks Me Later

For the November Month Notes – Class 7 Computer Subject

Unites we covered in Notes

Computer Security
a) Threats to Computer
b) Virus and its Types
c) Antivirus
d) Software and Types of Software
e) Firewall and its use
f) Cyber Crime
g) Backup and Restore
h) Cyber Law and its importance

a) Threats to Computer

Meaning: Any activity that can damage a computer, steal information, or stop it from working properly.

Examples of threats:

• Virus: A harmful program that spreads.
• Hacking: Unauthorized access to computer.
• Phishing: Fake messages/emails to steal passwords.
• Malware: Malicious software like spyware, ransomware, etc.

b) Virus and Its Types

Computer Virus: A program that damages files, slows down the system, or steals information.
It spreads through infected files, pen drives, or internet downloads.

Types of Virus:

1. File Virus – Attaches itself to program files.
2. Boot Sector Virus – Infects the computer’s startup (boot) area.
3. Macro Virus – Found in MS Word/Excel documents.
4. Worms – Self-replicating virus that spreads fast.
5. Trojan Horse – Looks like a useful program but is harmful.

c) Antivirus

Definition: A program used to detect and remove viruses.
Examples: Quick Heal, Avast, McAfee, Kaspersky.
Uses:

• Scans computer for viruses.
• Removes or repairs infected files.
• Provides real-time protection.

d) Software and Types of Software

Software: A set of instructions/programs that tell the computer what to do.

Types:

1. System Software – Controls computer hardware.
   • Example: Operating System (Windows, Linux), Utility programs.
2. Application Software – Used to perform specific tasks.
   • Example: MS Word, Paint, Chrome browser, Tally.

e) Firewall and Its Use

Firewall: A security system (software or hardware) that controls incoming and outgoing network traffic.

Uses:

• Blocks unauthorized access.
• Protects computer from hackers.
• Filters harmful websites.

f) Cyber Crime

Definition: Crime done using a computer and internet.

Examples:

• Hacking accounts.
• Spreading viruses.
• Online fraud or banking fraud.
• Cyber bullying.
• Stealing personal data.

g) Backup and Restore

• Backup: Making a copy of important files in another safe place (e.g., hard disk, Google Drive, pen drive).
• Restore: Bringing back files from backup when original files are lost or damaged.

Importance: Protects us from data loss due to virus, hardware failure, or accidental delete.

h) Cyber Law and Its Importance

Cyber Law: Laws made to stop and punish cyber crimes.

Importance:

• Protects users from online fraud.
• Punishes hackers and criminals.
• Ensures safe use of internet.
• Protects privacy and data of people.

Key Points to Remember for Computer Security

• Computer security keeps systems safe from threats.
• Viruses have different types (file virus, boot virus, worms, etc.).
• Antivirus software protects against harmful programs.
• Firewall acts as a wall between computer and hackers.
• Cyber crime is punishable under Cyber Law.
• Backup & Restore save us from losing data.