An Antivirus is a type of software designed to detect, prevent, and remove malicious software, commonly known as malware, from computers, mobile devices, and networks. It serves as a critical first line of defense to protect your system and data from being compromised or damaged.
What Antivirus Software Protects Against?
While originally designed for computer viruses, modern antivirus software provides protection against a wide range of cyber threats:
- Viruses: Programs that attach to legitimate files and can spread, corrupting data or slowing down your system.
- Worms: Self-replicating programs that spread across networks, consuming bandwidth and system resources.
- Trojan Horses: Programs disguised as legitimate software that secretly carry out malicious functions.
- Ransomware: Software that encrypts your files and demands a ransom for their release.
- Spyware: Software that secretly monitors and collects your personal or organizational information.
How Antivirus Software Works?
Antivirus programs typically operate in the background to provide real-time protection and use a few key detection methods:
- Signature-Based Detection: This method scans files and programs for unique patterns of code (known as “signatures“). It then match them those of known malware stored in the antivirus company’s database. This database is updated automatically and regularly.
- Heuristic/Behavioral Detection: This is designed to catch new or unknown threats. Instead of looking for a known signature, it monitors the behavior of a file or application. If it tries to perform suspicious actions (like excessively modifying system files or deleting data), the software flags it as a potential threat.
- Real-Time Scanning: The software continuously monitors files as they are opened, created, or downloaded, and blocks them immediately if a threat is detected.
- Quarantine/Removal: Once malware is detected, the antivirus software will typically attempt to quarantine (isolate it so it can’t cause harm) or delete the malicious file.
