A virus is a type of malicious software (malware) designed to infect computer systems, replicate itself, and spread to other devices. It can corrupt files, steal data, slow down performance, and even take control of a system.
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Types of Computer Viruses
1. File Infector Virus – Attaches to executable files (.exe, .dll) and spreads when they are run.
2. Boot Sector Virus – Infects the boot sector of storage drives, making it hard to remove.
3. Trojan Horse – Disguised as legitimate software but secretly performs malicious activities.
4. Worms – Self-replicating malware that spreads without user interaction.
5. Ransomware – Encrypts files and demands payment for decryption.
6. Spyware & Keyloggers – Secretly monitors user activity and steals sensitive information.
7. Adware – Displays unwanted ads and collects user data.
8. Rootkits – Grants attackers hidden access to a system, making it difficult to detect.
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Signs of a Virus Infection
✔️ Slow System Performance
✔️ Frequent Crashes or Freezes
✔️ Unwanted Pop-ups and Ads
✔️ Unknown Programs Running in Background
✔️ Unusual Network Activity
✔️ Missing or Corrupted Files
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How to Remove and Prevent Viruses
✅ Use Antivirus Software – Install and update security programs like Windows Defender, Bitdefender, or Kaspersky.
✅ Keep Your System Updated – Apply the latest security patches for Windows, macOS, and Linux.
✅ Avoid Suspicious Links & Downloads – Do not open unknown email attachments or download from untrusted sites.
✅ Enable Firewall Protection – Prevents unauthorized access to your network.
✅ Use a Secure Browser & Extensions – Block malicious scripts using browser extensions like uBlock Origin.
✅ Regular Backups – Store important data on an external drive or cloud storage to prevent ransomware attacks.
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