Overview
Fake antivirus scams, also known as scareware, use alarming pop-ups and fake security alerts to trick you into believing your computer is infected with viruses. These pop-ups mimic legitimate antivirus warnings and pressure you to purchase fake security software, call a fake support number, or download actual malware. The fraudulent software either does nothing or actively harms your computer while charging you for protection.
How This Scam Works
Malicious websites or ads display fake virus detection pop-ups that mimic Windows Defender, Norton, or McAfee alerts.
The pop-ups claim your computer is infected and cannot be closed normally, creating panic and urgency.
Victims are directed to purchase fake antivirus software, call a tech support number, or download a program that installs actual malware.
Some scareware installs legitimate-looking programs that run fake scans showing dozens of threats, reinforcing the need to pay for the full version.
Warning Signs
Real Scam Examples
These are examples of messages used in this type of scam.
WARNING! Windows has detected 47 viruses on your system! Your personal data, bank passwords, and photos are at risk. Download TotalSecure Antivirus NOW to remove threats. Your PC will be permanently damaged in 5:00 minutes if action is not taken.
CRITICAL ALERT FROM MICROSOFT: Your computer has been locked. Trojan Spyware detected! Call Microsoft Support immediately: 1-888-XXX-XXXX. Do not restart your computer or you will lose all data.
How to Protect Yourself
1Close the browser to dismiss fake alerts
Use Ctrl+Alt+Delete (Windows) or Force Quit (Mac) to close your browser. Do not click anything within the pop-up, including close or cancel buttons.
2Use only reputable antivirus software
Install trusted antivirus software from known companies like Windows Defender (built-in), Malwarebytes, Bitdefender, or Norton. Purchase directly from official websites.
3Keep your browser updated
Modern browsers have built-in protection against malicious pop-ups and known scareware sites. Ensure your browser is always up to date.
4Use an ad blocker
Ad blockers can prevent many malicious ads and pop-ups from appearing in the first place, reducing your exposure to scareware.
Frequently Asked Questions
Think you have received a scam like this?
Paste the suspicious message into our free AI-powered scam analyzer.
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