Tech support scams and fake "computer locked" pop-ups

A loud pop-up says your computer is locked and tells you to call a number. Here is why it is a scam and how to get out of it calmly.

Last updated November 7, 2026

Suddenly the screen turns red. A voice says, "Your computer has a virus. Do not turn it off. Call this number." Or a phone call says the same thing. This is a tech support scam. Your computer is almost always fine.

What is really happening

The pop-up is just a web page made to look like an alert. Real companies do not put a phone number in a warning and ask you to call. The goal is to get you to call a stranger, who will ask you to open a remote-control program like AnyDesk, TeamViewer or Quick Assist, and then ask you to pay.

If a pop-up appears

1. Do not call the number. Do not type your password or any card number.
2. Try to close the browser. If it will not close, press and hold the power button to turn the computer off. You will not lose anything important.
3. Open the browser again. If it asks to restore your last session, say no.
4. If you are not sure, ask someone you trust to look at it with you.

If someone already has control

1. Turn off Wi-Fi, or unplug the network cable. That cuts them off at once.
2. Close the remote-control program, or shut the computer down.
3. Call your bank if you gave card or bank details, and follow what to do if you have been scammed.
4. Have someone you trust check the computer before you sign in to anything.

For the family

PonchoGuard for Windows notices when a remote-control program starts and asks, "Did someone call and ask you to open it?" It can tell your family. It is careful, not perfect, so it is one layer, not a promise. See PonchoGuard for Windows.