Suspicious Login Issues

How to Close a Fake Windows Defender Tech Support Scam Pop-Up

Algirdas Jasaitis Oct 15, 2026 870 views

Question details

The user is trapped by a full-screen pop-up warning falsely claiming to be Windows Defender, which displays a phone number and prevents the window from being closed normally.

How to Close a Fake Windows Defender Tech Support Scam Pop-Up

Product: Windows OS / Web Browser
Device & OS: Windows
Scenario: A malicious webpage has hijacked the web browser, displaying a fake virus alert to trick the user into calling a fraudulent technical support number.
Observed behavior: The browser is locked in full-screen mode showing a fake Trojan warning, displaying a contact number (like 1-844-622-4430), and blocking the user from clicking the close button or restarting easily.

Before you start

Do not call the phone number displayed on the screen, provide remote access to your device, or share any personal, financial, or password information.

Solution 1Recommended

Use Keyboard Shortcuts to Close the Warning

Quickly escape the hijacked full-screen mode and close the browser window using simple keyboard shortcuts.

These fake alerts use aggressive scripts to hide your taskbar and disable the standard exit buttons. Using native Windows keyboard shortcuts is the fastest way to bypass their trap.

Minimize the scam screen

Press the Ctrl + Esc keys simultaneously on your keyboard. This forces the Windows Start menu to open and minimizes the locked full-screen browser window.

Close the browser tab

Once you have access to your normal desktop view, hover over your browser icon on the taskbar, right-click the active window preview, and select 'Close window', or simply click the 'X' on the browser interface.

Use Keyboard Shortcuts to Close the Warning

Immediate Relief: Closing the browser tab immediately stops the malicious script from running.

Solution 2

Force Close the Browser via Task Manager

If keyboard shortcuts do not restore access, use the Task Manager to forcefully terminate the browser process.

Solution 3

Run a Genuine Antivirus Scan

Ensure your system remains clean by running a legitimate Windows Security scan after successfully closing the fake pop-up.

Free Microsoft Office alternative

Work Securely and Efficiently with WPS Office

While keeping your system secure from online scams, ensure your daily productivity is supported by a reliable and safe office suite. WPS Office is a highly compatible, lightweight, and secure alternative to Microsoft Office that meets all your document needs without the high cost.

100% compatible with Microsoft Office formats including Word, Excel, and PowerPoint.Secure, ad-free document editing environment protecting your sensitive data.Lightweight software architecture that won't slow down your Windows PC.Completely free to download with a familiar, easy-to-use interface.

microsoft office alternative - wps office

Frequently Asked Questions

Is the Windows Defender pop-up with a phone number real?

No. Official Microsoft error messages and genuine Windows Defender alerts will never display a phone number or ask you to call technical support. Any warning prompting you to call a number is a scam.

What should I do if I already gave remote access to the scammers?

Immediately disconnect your computer from the internet. Uninstall any remote desktop applications they instructed you to install, run a full antivirus scan, change your important passwords from a different secure device, and contact your bank if you shared any payment information.

Why does the fake pop-up prevent me from closing it normally?

The fraudulent webpage utilizes aggressive JavaScript to loop full-screen commands, trap your mouse cursor, and display continuous dialogue boxes. This is designed to create panic and make you believe your computer is actually locked by a virus.

Will restarting my computer fix the locked screen scam?

Yes, forcefully shutting down or restarting your computer will clear the active memory and close the browser displaying the scam. However, when you reopen your browser, ensure you do not click 'Restore previous session', as this may reload the malicious page.

Microsoft Office Security Issues