“Your computer is infected” browser pages are usually scareware or tech support scams. A real antivirus warning appears in your security app, not in a random web page demanding that you call support, pay money, or install a “cleaner”. Close the page first, then check Windows Security or your installed antivirus directly.
Is “your computer is infected” real?
- Browser pop-up with phone number: scam.
- Real antivirus app alert: check it inside the app.
- Do not call pop-up support or install suggested tools.
- Remove notification permissions if alerts keep returning.
| Likely scam | Web page says PC is locked, plays audio, shows timer/phone number |
| Real check | Windows Security → Virus & threat protection |
| Common cause | Malvertising, notification spam, rogue extension, adware |
| Safe action | Close browser, revoke notifications, scan if it returns |
How to remove fake infected-computer alerts
- Close the tab. If blocked, use Task Manager to end the browser.
- Reopen without restoring the previous session.
- Remove suspicious site notifications.
- Remove unknown extensions.
- Check installed apps for fake cleaners or support tools.
- Run a full scan if redirects continue.
After manual cleanup: reboot Windows and run a full scan to check startup entries, scheduled tasks, bundled apps, and hidden files that may restore the threat.
FAQ
Can a website know my computer is infected?
No ordinary web page can perform a real full-system antivirus scan.
What if I called the number?
Do not pay or install remote tools. If you already did, disconnect, uninstall the tool, scan, and change passwords.
Why does it keep appearing?
You may have allowed notifications or installed an extension/adware component.
Sources: FTC tech support scam guidance and Microsoft Windows Security guidance.
