A pop-up says your computer is infected

Loud warnings with a phone number are a scam. Here is how to close them.

Updated September 21, 2026

Some websites show a full screen warning with a siren sound and a phone number. It looks scary, but it is fake. Microsoft does not put phone numbers in browser warnings.

  1. Do not call the number, and do not click anything in the message.
  2. Close the browser. If it will not close, press Ctrl + Shift + Esc, select the browser and choose End task.
  3. Open the browser again. If it offers to restore your tabs, choose no.
  4. If you already called the number or let someone connect, call or text us at (231) 884-7146 right away.
Careful

Never let a stranger control your computer, and never pay anyone with gift cards.