Suspicious Login Issues

How to Fix Fake PC Security Alert Phone Number Scams

Emma Brown Oct 9, 2026 868 views

Question details

The user needs to know how to respond to a sudden browser warning claiming their computer is locked and urging them to call a provided phone number.

How to Fix Fake PC Security Alert Phone Number Scams

Product: Web Browser
Device & OS: not provided
Scenario: While browsing the internet, a sudden pop-up takes over the screen, freezing the browser and displaying an alarming security message with a tech-support phone number.
Observed behavior: The browser displays a fake locked screen warning alongside a phone number (e.g., 855-429-1062), mimicking a legitimate system error or Microsoft security alert.

Before you start

Do not call the phone number displayed on your screen, and never provide personal information or download software requested by the alert.

Solution 1Recommended

Force Close the Scam Browser Window

Use this method to safely exit the fake security alert without interacting with any malicious elements on the page.

Fake tech-support scams rely on deceptive full-screen modes to make it look like your entire computer is locked. Forcing the browser to close will immediately bypass the fake alert.

Use the Alt+F4 Shortcut

Press the 'Alt' and 'F4' keys simultaneously on your keyboard to force the active scam browser window to close.

Use Task Manager

If the browser refuses to close via the keyboard shortcut, press 'Ctrl + Shift + Esc' to open the Windows Task Manager. Locate your browser in the list of active processes, click on it, and select 'End task'.

Identification Tip: Genuine Microsoft error messages do not display unsolicited phone numbers for technical support.

Solution 2

Restart Your Computer and Run a Security Scan

If your browser remains completely unresponsive, performing a hard restart and scanning for malware will clear the alert and ensure your system is safe.

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Frequently Asked Questions

Can a scam website actually lock my computer system?

No, web browsers are restricted in what they can do to your operating system. These fake alerts use deceptive full-screen modes and repetitive pop-up scripts to create the illusion that your entire computer is locked, but your actual system remains unaffected.

Are legitimate Microsoft error messages ever accompanied by a tech-support phone number?

No. Genuine Microsoft error messages and system alerts do not include phone numbers for unsolicited technical support. Microsoft will never ask you to call them directly via a browser pop-up.

What should I do if I already called the scam phone number?

If you called the number and provided personal information or allowed remote access to your PC, immediately disconnect your computer from the internet. Run a full antivirus scan, change your important passwords from a different device, and contact your bank if financial details were shared.

Microsoft Office Security Issues