What is Antivirus?
What is Antivirus?
An antivirus is a program that removes and prevents malware (malicious software) from infecting computers and laptops. Malware can steal data, encrypt it so you can’t access it, or even destroy your devices entirely. In most cases, malware enters a computer when you click on a dubious attachment in an email or visit a malicious website. Antivirus programs use signature, heuristic, and behaviour-based detection methods to identify malware and stop it in its tracks.
The most common method involves scanning files and programs going in and out of your system, comparing them to a database of known viruses. If a file is recognized as a dangerous virus, it’s quarantined or deleted. Heuristic detection is a less invasive approach that monitors what software does and flags anything that looks suspicious. Finally, behavior-based detection analyzes how malware works and looks for similar tendencies, identifying it in real time.
While antivirus is effective at preventing most infections, it can occasionally mislabel a file as a threat when it’s actually harmless. This is called a false positive. If this happens, you can try running a safe internet search or checking for software updates to resolve the issue.
When choosing the best antivirus, consider how it performs in independent lab tests. A high score from a trusted lab is a good indication that the antivirus can reliably detect and block most threats. Also, think about what other security features you want to see in the antivirus. For example, some programs include a password manager and parental controls, while others offer extra safety tools like firewalls.