Antivirus for phones and computers: do you still need one?
An antivirus is a program that checks files and apps for malicious code, blocks dangerous websites and removes threats. Modern systems have built-in protection: Microsoft Defender in Windows, Google Play Protect in Android and XProtect in macOS.
In plain words
An antivirus is like a security guard at the school entrance: it checks who comes in and keeps out known troublemakers on its "list". But a crafty stranger in school uniform might slip past. So besides the guard, it is important not to open the door to everyone who knocks.
How it works
- The antivirus compares files with a database of known threats (signatures).
- Behavioural analysis spots suspicious actions even from new programs.
- It checks websites and links for phishing.
- Its databases are updated daily over the internet.
- Threats it finds are isolated (quarantined) or deleted.
Where you'll see it
Windows has Microsoft Defender built in, Android has Google Play Protect, and iPhone has a closed system that vets apps. Third-party antiviruses (Bitdefender, ESET, Avast and others) offer extra features. Some vendors are restricted by governments in certain countries - Kaspersky, for example, is banned in the US - so check local guidance.
Does it matter when buying
On Windows, the built-in Defender is enough for most people as long as the system stays updated. On Android, Play Protect plus caution with APKs. On iPhone a separate antivirus is effectively unnecessary. The best protection is updates, 2FA and healthy scepticism about links.
Myths
- Myth: With an antivirus you can install anything. Reality: An antivirus can miss new threats and phishing.
- Myth: A free antivirus is a trap. Reality: Built-in free solutions are perfectly reliable.
FAQ
Do I need an antivirus on iPhone?
Not a separate one; updates and caution with links matter more.
Does an antivirus slow down a phone?
Good ones barely do; poor ones can drain the battery.
What is quarantine?
An isolated area where the antivirus moves suspicious files.