Misconceptions about antivirus software can lead to poor security decisions. We debunk the 10 most persistent antivirus myths in 2025.

Myth 1: “Antivirus Slows Down My Computer Too Much”

FALSE. Modern antivirus is lightweight. Options like Webroot, ESET, and Bitdefender have minimal impact. The protection benefit far outweighs any performance cost.

Myth 2: “I Only Visit Safe Websites, So I Don’t Need Antivirus”

FALSE. Malicious websites can appear legitimate and compromise visitors in seconds. Every website is potentially dangerous.

Myth 3: “Antivirus Companies Create Viruses to Sell Products”

FALSE. No credible evidence supports this. Antivirus companies hire independent labs for testing.

Myth 4: “Macs Don’t Get Viruses”

FALSE. Mac malware increased 400%. All computers need antivirus.

Myth 5: “Free Antivirus Is Good Enough”

SOMETIMES. For basic users, Windows Defender or Avast Free is sufficient. Power users need premium features.

Myth 6: “I Don’t Need Antivirus If I Have a VPN”

FALSE. VPN encrypts your connection but doesn’t protect against malware. You need both.

Myth 7: “Antivirus Can’t Stop Zero-Day Attacks”

PARTIALLY TRUE. Premium antiviruses use behavioral analysis and AI to catch zero-day threats.

Myth 8: “iPhones Can’t Be Hacked”

FALSE. iPhones can be compromised through iOS vulnerabilities, phishing, and malicious profiles.

Myth 9: “Once Installed, Antivirus Provides Permanent Protection”

FALSE. Threats evolve constantly. Keep antivirus updated and run regular scans.

Myth 10: “I Don’t Need Antivirus on a Phone/Tablet”

FALSE. Mobile malware is surging. Android devices especially need antivirus protection.