Tech support pop-up scam: "your computer is infected"
A loud pop-up or full-screen warning says your computer has a virus and your bank information is at risk, and tells you to call "Microsoft Support". The number goes to a scammer.
How this scam works
Once you call, the "technician" asks to connect to your computer. From there they can steal passwords, open your bank account, or charge you for fake repairs.
Common versions of the message
- A virus warning with a phone number
- A warning not to turn off your computer
- A technician who needs remote access
What the message looks like
Text from Windows Security Alert
WARNING! Your computer has been infected with a virus and your bank information is at risk. Do not turn off your computer. Call Microsoft Support immediately at (555) 012-6640 and allow the technician remote access to fix it.
Fictional example based on common, publicly reported scam patterns.
The red flags
- 1
Fake alarm: “Your computer has been infected”
Real warnings never give you a phone number
Real security warnings from Microsoft or Apple never include a phone number to call.
- 2
Keeps you stuck: “Do not turn off your computer”
Closing the browser is the safe move
Telling you not to turn off the computer keeps you stuck. Closing the browser is safe.
- 3
Call this number: “Call Microsoft Support immediately”
Microsoft does not put numbers in pop-ups
Microsoft does not put support numbers in pop-ups.
- 4
Remote access: “allow the technician remote access”
This hands them control of your computer
Remote access gives a stranger control of your computer.
What to do
- Do not call the number.
- Close the browser. If it will not close, restart the computer.
- Run your normal antivirus scan if you are worried.
If you already replied, clicked, or paid
- If you allowed remote access, disconnect from the internet and get the computer checked by someone you trust.
- Change passwords for email and banking from a different device.
- If you paid or shared bank details, call your bank using the number on your card.
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