The "your computer has a virus" pop-up
A web pop-up may claim your device has a virus. That is not proof. This made-up warning wants you to call a stranger and give them control.
Step 1 See what it looks like
! 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.
Step 2 Find the red flags
- 1
“Call Microsoft Support now: 1-800-555-0199”
The phone number in this warning is the trap. Find real support yourself.
- 2
“DO NOT turn off your computer or close this window”
The page wants to stop you leaving. Use browser controls to close it.
- 3
“right now”
The rush makes you less likely to check.
- 4
“A certified technician will fix this immediately”
A title and a promise do not prove you can trust the caller.
Step 3 See why it works
The message uses a company name you know to scare you. It wants you to call, give device access, or pay. The name does not prove who made the page.
- Do not call the number or download its tool.
- Do not press buttons inside the pop-up. Even a close button can be fake.
- Use the browser controls to close the tab or window. If stuck, use device help to quit the browser. You may lose unsaved work.
- Do not restore the suspect tab. Get trusted help if it comes back.
- If you gave remote access, end it. Take the device off the network. Get trusted help to remove unwanted tools.
- Use a different trusted device to secure any exposed accounts. Call your bank now if money or bank details were involved.
A scary web page does not prove a virus. Close it and find help from a source you know.