That "your computer is infected" popup is a scam: don't call the number

Here is the bottom line: that huge, frightening warning saying your computer is infected, locked or "reported to Microsoft" is almost never a real virus. It is a scam page, an advertisement built to scare you, and the one thing you must never do is call the phone number on the screen. Nothing it says is true. Your files are fine, your computer is not locked, and Microsoft is not watching you. Below is how to close it safely, check the computer afterwards, and what to do if you have already rung the number or let someone connect. Take a breath. This is easier to fix than it looks.

What that scary screen actually is

It looks like your computer talking to you. It isn't. It is just a webpage, the same as a news site or a recipe page, except this one was built to cause panic. It usually appears after a dodgy ad, an email link, or a mistyped web address. The page throws itself into full screen so it covers everything, which is what makes the computer feel "locked."

The stagecraft is always the same:

• Fake branding. Microsoft or Apple logos, official-looking error codes, sometimes a picture of a real security program.
• Alarm sounds. Sirens, beeping, even a robotic voice reading the warning aloud. All of it comes from the webpage, not from your computer.
• "Do not close this window." Real warnings never say this. Closing the window ends the whole trick.
• A countdown claiming your files, photos or banking details are being stolen right now. They aren't. A webpage cannot scan your computer.

The one rule that settles it

If you remember nothing else from this page, remember this: Microsoft, Apple and your bank will never put a phone number in a popup. Not ever. Real companies do not know when your computer has a problem, and they do not ask you to ring a "support line" from a warning. The phone number is not the way out of the problem. The phone number is the problem. On the other end sits a scammer whose job is to talk you into remote access, or into paying for repairs you never needed. A phone number in a warning means one thing: it is fake.

What to do right now, step by step

If one of these screens is in front of you, do this, in order:

1. Don't call the number, and don't click anything on the warning. Not the buttons, not the links, not even its own little X, which is sometimes fake too.
2. Try the Escape key first. Press and hold Esc (top left of the keyboard) for a few seconds. That often drops the page out of full screen.
3. Close the browser. On a Windows computer, hold Alt and press F4. On a Mac, hold Cmd and press Q. The browser shuts, and the "warning" dies with it.
4. Truly stuck? Turn it off. Hold the power button until the computer switches off, wait ten seconds, then turn it back on. It feels drastic, but nothing is harmed by turning a computer off, and it always works.

That is the whole rescue. No tools, no expertise, nothing to buy.

How to check the computer afterwards

When it is back on, two small checks and you are done:

• Open the browser without restoring tabs. If it asks "Restore pages?" say no. Restoring brings the scam page straight back.
• Run the built-in security scan. On Windows, open Windows Security from the Start menu and run a full scan. On a Mac, protection already runs in the background. The scan almost always comes back clean, because the popup was never an infection, and now you know for certain.

If the warnings keep returning day after day, something does need attention. That is the point to get a trusted person to look at it.

If you already called, or let someone connect

First, and this matters: no shame. These screens are professionally designed to panic sensible people, and they catch plenty of younger people who are supposed to know better. What matters now is speed, not embarrassment. Work down this list:

1. Hang up. Even mid-sentence. You owe a scammer no politeness.
2. Disconnect the internet if you let anyone connect to the computer. Turn the wifi off or unplug the network cable. That cuts their access instantly.
3. Change your important passwords from a different device, your phone or a family member's computer. Email and banking first.
4. Ring your bank on the number printed on your card if money, cards or account details came up at all, even briefly. Banks handle this every day.
5. Get the computer checked by someone you trust before you use it for banking again.
6. Report it to Scamwatch at scamwatch.gov.au. It takes a few minutes and helps warn other Australians.

Acting in the first hour makes a real difference. If you would like a calm voice walking you through it, that is what we do, and our guide to computer help over the phone explains how trustworthy remote help differs from the scam version.

How to tell a real warning from a fake one

Real security warnings are boring, and that is the giveaway. Genuine antivirus software behaves like this:

• It shows a small, quiet notification, usually in a corner of the screen. No sirens, no voices, no flashing red page.
• It never asks you to call anyone. There is no phone number on a real virus warning, full stop.
• It does not lock your screen or beg you not to close it.
• It names the problem file and removes it itself, with one click. It fixes; it does not sell.

So the test is simple. Does the warning want you to call, pay or hurry? Fake. Does it quietly say "threat found and dealt with"? That is the real thing doing its job. The same behaviour test works on suspicious emails, texts and phone calls too, and we have written that up in plain English in how to spot a scam.

Stopping the popups before they start

You cannot make these pages vanish from the internet, but you can make them rare:

• Let the computer update itself. Updates close the holes scammers lean on. When it asks to restart for an update, let it.
• Keep the browser current too. Modern browsers block many of these pages before you ever see them, but only when they are up to date.
• Consider a reputable ad blocker. Most scam pages arrive through poisoned ads on otherwise ordinary websites. A good ad blocker removes the ads, and the trapdoor with them. Setting one up is a small job, and we are happy to help.
• Use your bookmarks for banking and shopping sites rather than typing addresses. Some scam pages sit on misspellings of popular websites.

The short version

The "your computer is infected" popup is theatre. It is a webpage pretending to be your computer, and every scary thing on it is part of the act. Never call the number and never click the warning. Hold Esc, close the browser with Alt+F4 or Cmd+Q, or simply hold the power button until it turns off. Reopen without restoring tabs and run the built-in scan. If you have already called or let someone in, hang up, disconnect, change passwords from another device and ring your bank, without a moment of embarrassment. And if you would rather not face any of it alone, get in touch and we will sort it out together, patiently and in plain words.