Demand that you download a specific "repair tool" immediately via a browser link. How to Kill a Stubborn Popup
Press Ctrl + Shift + Esc to open Task Manager, find your browser (Chrome, Edge, etc.), and click End Task . virus popup
If you want to check your system, ignore the browser alert and open your actual installed security software (like Malwarebytes or Windows Security) to run a manual scan. The Bottom Line Demand that you download a specific "repair tool"
: Never call any phone numbers listed in the warning. Real security companies like Microsoft or Apple will never ask you to call them via a popup. How to Stop Persistent Popups find your browser (Chrome
The best defense is a boring offense. To keep these popups at bay: