Fake Antivirus Scams
Bogus 'your device is infected' warnings pushing paid 'security' software or support fees.
Last reviewed: 1 June 2026
What this scam is
Fake antivirus (scareware) scams display alarming 'infection' warnings to trick you into buying useless or malicious 'security' software, or calling a fake support line that charges fees and installs malware.
How it works
A popup or page claims your device is infected, often with fake scan animations and a countdown. Clicking installs malware or leads to a payment page, or a number connects you to scammers who 'fix' the non-existent problem.
Common red flags
- Sudden 'infected' popups with urgency and sound
- A phone number to call for 'support'
- Pressure to buy security software immediately
- Warnings that you can't easily close
Sanitized example messages
Illustrative, sanitized examples. Personal details are replaced with placeholders such as [phone number] and [fake link].
WARNING: 5 viruses detected! Call [phone number] now or your data will be lost.
Payment methods used
- Card
- Remote-access-enabled bank theft
Who is usually targeted
- General computer users
- Older adults
What to do immediately
- Don't call the number or pay; close the browser (force-quit if needed)
- Run a scan with reputable security software you chose yourself
- If you installed anything, disconnect and seek trusted help
Evidence to preserve
- Screenshots of the popup
- Any number or software named
- Payment records
Where to report it
- Action Fraud (UK) — UK national fraud & cybercrime reporting centre
- FTC ReportFraud (US) — US Federal Trade Commission fraud reports
- FBI IC3 (US) — US Internet Crime Complaint Center
- Scamwatch (Australia) — Australian competition & consumer reporting
- Your bank's fraud line — Use the number on the back of your card or in your banking app — never a number the caller gives you
Always verify reporting routes and emergency contacts on the official government or agency website for your country.
Frequently asked questions
Can a website really detect viruses on my device?
No. A web page cannot scan your device. 'Infection' popups with phone numbers and urgency are scareware designed to sell useless software or connect you to scammers.