Antivirus

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Antivirus Software

What is Antivirus?

Antivirus is a security software designed to:

  • Detect

  • Prevent

  • Remove

Viruses, malware, spyware, ransomware, trojans, worms, and other malicious programs from a computer or mobile device.

Antivirus keeps your system safe by scanning files, detecting threats, and removing harmful software.

Functions of Antivirus Software

✅ 1. Virus Detection

Scans files, programs, and memory to identify known and unknown viruses.

✅ 2. Virus Removal

Deletes or repairs infected files to remove viruses.

✅ 3. Real-Time Protection

Monitors system activities continuously to block threats instantly.

✅ 4. Scheduled Scans

Allows users to set daily, weekly, or monthly automatic scans.

✅ 5. Firewall Protection

Blocks unauthorized access to your computer and network.

✅ 6. Email Protection

Scans email attachments to detect phishing, spam, or infected files.

✅ 7. Web Protection

Warns or blocks harmful websites to protect users from online threats.

✅ 8. USB/External Drive Scanning

Automatically scans pendrives, SD cards, and external hard disks.

Types of Antivirus

1. Signature-Based Antivirus

Detects viruses using a virus signature database.
Useful for known viruses.

Examples:

  • Quick Heal

  • McAfee

2. Heuristic-Based Antivirus

Detects unknown or new viruses by analyzing suspicious behavior.

3. Real-Time Antivirus

Continuously runs in the background and blocks threats instantly.

Examples:

  • Windows Defender

  • Avast

4. Cloud-Based Antivirus

Uses cloud servers for scanning, making detection fast and efficient.

Examples:

  • Bitdefender

  • Kaspersky Cloud

5. Full Security Suite

Provides complete protection from all malware, including firewall, anti-spam, anti-phishing, parental controls, etc.

Examples:

  • Norton Security

  • Kaspersky Total Security

Popular Antivirus Software

Here are some widely used antivirus programs:

For Windows:

  • Windows Defender

  • Quick Heal

  • Kaspersky

  • Norton

  • McAfee

  • Avast

  • Bitdefender

For Mac:

  • Bitdefender

  • Norton

  • Intego

For Mobile:

  • Avast Mobile Security

  • Kaspersky Mobile

  • McAfee Mobile

Advantages of Antivirus

  • Protects data from viruses

  • Prevents unauthorized access

  • Improves system security

  • Reduces chances of hacking

  • Protects while browsing

  • Protects online banking and payments

Disadvantages of Antivirus

  • Can slow down the system

  • Requires frequent updates

  • Paid antiviruses can be expensive

  • Sometimes gives false alerts

Why Antivirus is Important?

Because modern devices are always connected to the internet and are easily exposed to:

  • Malware

  • Hacking

  • Phishing

  • Ransomware

  • Data theft

Antivirus keeps your system secure from these threats.

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