A scary pop-up can jump onto your screen. It looks official and feels urgent. Take a breath. The pop-up cannot hurt your computer. You stay safe. Do not click it. Do not call the number.

! WARNING ! Microsoft Security Alert. Your computer has been infected with a virus. Hackers may be stealing your passwords and bank details right now. DO NOT turn off your computer or close this window. Call Microsoft Support now: 1-800-555-0199. A certified technician will fix this immediately.
This is a made-up example to teach you. We will never show you a real person’s message.
“Call Microsoft Support now: 1-800-555-0199”
Real virus warnings never give you a number to call. Microsoft and Apple never do this.
“DO NOT turn off your computer or close this window”
They say this so you cannot stop or think. A real warning never tells you that.
“right now”
Rushing you stops you from checking. Real help is never this rushed.
“A certified technician will fix this”
If you call, they ask to control your screen. Then they ask you to pay, often with gift cards. That is the trap.
“Hackers may be stealing your passwords”
Scary words make your heart race. They want you to call before you think.
The pop-up looks official. It uses a big trusted name like Microsoft or Apple. It scares you about your money and passwords. Then it tells you not to close it. That fear and rush make you call. A stranger then asks to control your screen. They ask you to pay with gift cards.

Real companies never put a number in a virus warning. They never cold-call you about a virus. Do not click. Do not call. Do not pay.