How to Avoid Tech-Support Scam Calls and Pop-Ups

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The Problem

A phone rings: "This is Microsoft. We've detected a virus on your computer." Or a full-screen pop-up appears with a loud alarm: "Your PC is infected—call this number now!" Both are tech-support scams, and they're designed to frighten you into handing over money or remote access to your computer. No real tech company works this way. Knowing the playbook makes these easy to shut down.

How the Scam Works

The con follows a predictable script:

  1. Contact: a cold call, a pop-up, or a scary email claims your device has a problem.
  2. Fear: they invent an urgent threat—viruses, hackers, an expiring subscription.
  3. Access: they ask you to install "support software" so they can control your screen.
  4. Payment: they "fix" a fake problem and demand payment, often by gift card or wire transfer.

Everything hinges on panic. Slow down, and the whole thing falls apart.

Red Flag 1: They Contacted You First

This is the giveaway. Microsoft, Apple, Google, and your bank will never cold-call you about a virus or "suspicious activity" on your PC. They don't monitor your computer and have no way to know it has a problem. Any unsolicited call, pop-up, or email claiming otherwise is a scam—full stop.

Red Flag 2: Scary Pop-Ups With a Phone Number

A real virus warning comes from your security software quietly, in the corner of the screen. A scam warning takes over the whole screen, plays a siren, blocks you from closing the page, and—crucially—gives a phone number to call. Real error messages never tell you to phone someone. If you see this, it's a fake. Learn the full pattern in remove fake antivirus and scareware.

Red Flag 3: They Want Remote Access

The scammer's goal is to get you to install remote-control software (names like AnyDesk or TeamViewer) so they can see your screen and type on your computer. Once in, they can plant real malware, open your bank account, or "show" you fake problems. Never give remote access to someone who contacted you out of the blue.

Red Flag 4: Payment by Gift Card

No legitimate company is paid in iTunes cards, Google Play cards, or cryptocurrency. If anyone asks you to buy gift cards and read off the codes, it is always a scam. This is the clearest sign of all.

What to Do During a Scam Call

  1. Don't engage or confirm anything—not your name, not whether you own a computer.
  2. Hang up. You don't owe a scammer politeness.
  3. Never call back the number they leave.
  4. If they already know some details about you, it's from public data—it doesn't mean they're real.

What to Do With a Scam Pop-Up

  1. Don't call the number and don't click anything in the pop-up.
  2. Close the browser. If it won't close, end it through Task Manager (Ctrl + Shift + Esc), or restart the computer.
  3. If a full-screen page traps you, try Alt + F4 or restart—the "infection" disappears because it was never real.
  4. Run a scan with your normal security software for peace of mind.

If You Already Gave Them Access or Money

Act quickly, but don't panic.

  1. Disconnect from the internet to cut off remote access (unplug Wi-Fi or Ethernet).
  2. Change your passwords from a different, trusted device—start with email and banking. See how to create strong passwords.
  3. Call your bank if you paid or shared card details; ask to reverse the charge and watch for further fraud.
  4. Uninstall any remote-access software they had you install, then run a full malware scan—remove a virus or malware.
  5. Turn on two-factor authentication so a stolen password can't be reused.

Protect Vulnerable Family Members

These scams target older relatives hardest. A quick conversation helps: explain that real companies never call about viruses, never ask for gift cards, and never need remote access. Encourage them to hang up and check with you before acting on any scary call or pop-up.

The One Rule to Remember

If someone contacts you claiming there's a problem with your computer and pressures you to pay or grant access, it's a scam—every time. Hang up, close the pop-up, and you've already won. For the email version of the same trick, see how to spot and avoid phishing.