Account Security Problems

How to Fix the Fake Windows Support Scam (PC Blocked Pop-up)

Algirdas JasaitisAlgirdas Jasaitis Oct 26, 2026 869 views

Question details

The user is encountering a persistent pop-up message on their screen claiming that their computer is blocked and instructing them to call a provided Microsoft support number.

How to Fix the Fake Windows Support Scam Claiming Your PC is Blocked
Product
Windows
Device & OS
Windows
Scenario
While browsing the internet or using the computer, a sudden security alert takes over the screen, preventing normal operation and urging immediate contact with tech support.
Observed behavior
A fake tech support pop-up locks the browser or screen, falsely stating the PC is blocked due to a virus or security breach, and provides a fraudulent phone number to call.
Before you start

Do not click any links on the pop-up, do not provide any payment or password information, and never call the phone number displayed. Genuine Microsoft error messages do not include phone numbers.

Solution 1Recommended

Force Restart Your Computer

Use this method to quickly escape the locked screen if the scam pop-up is preventing you from clicking anywhere else.

Tech support scam pop-ups often use full-screen modes or endless dialogue loops to make it seem like your entire system is locked. A hard restart will bypass this browser lock and restore normal access.

1
Attempt a standard restart

Press Ctrl + Alt + Delete on your keyboard. If the security menu appears, click the Power icon in the bottom right corner and select Restart.

2
Perform a hard restart

If the keyboard shortcut does not work, press and hold the physical power button on your computer for about seven seconds until the machine turns off completely.

3
Turn the computer back on

Wait a few seconds, then press the power button again to turn your computer back on. Do not restore the previous browser session when you open your web browser.

Force Restart Your Computer
Session Restored: By skipping the browser's 'Restore Session' prompt upon reboot, you prevent the malicious pop-up from reloading automatically.
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Frequently Asked Questions

How do I know if a Microsoft support warning is real?

Genuine Microsoft error messages and warnings never include a phone number. They also do not ask for personal information, payment, or remote access to your device. If a pop-up demands you call a number, it is a scam.

Can a fake support pop-up infect my computer with a virus?

Typically, the pop-up itself is just a malicious webpage displaying a script and is not a virus. However, if you click links within the pop-up, download attached files, or grant the scammers remote access, your computer can become infected with malware.

What should I do if I already called the scammer's number?

If you provided them with remote access, immediately disconnect your PC from the internet and run a full antivirus scan. If you provided credit card or bank details, contact your financial institution immediately to block the transaction and secure your accounts.

How can I prevent these fake pop-ups from appearing again?

Keep your web browser and operating system updated. Enable Windows Defender or use a reputable third-party antivirus, consider installing an ad-blocker extension, and avoid visiting suspicious websites or clicking on unknown links.