The browser suddenly fills the screen with flashing warnings, an alarm sound, and a message claiming your PC is infected. It may display a phone number for “Microsoft Support.” A Windows YYPAUS Login 10 fake virus warning pop-up in browser is designed to scare you into calling scammers.
These pages are websites, not real security alerts. They try to lock the browser in full-screen mode so it feels as though the whole PC has been taken over.
Your PC is usually not infected by simply seeing the page. The danger comes from calling the number, allowing remote access, or paying for fake repairs.
Closing the page safely is easy once you know the right keys.
Why This Happens
Fake warnings appear for these reasons:
- A malicious advert or redirect opened a scam page.
- A website you visited has been compromised.
- Browser notification permission was granted to a scam site.
- An unwanted browser extension is injecting pages.
Real Microsoft security warnings never include a phone number asking you to call.
Start With These Basic Checks
Close the page without interacting with it.
- Do not call the number or click anything on the page.
- Press Alt + F4 to close the browser window.
- If the browser will not close, press Ctrl + Shift + Esc, select the browser in Task Manager, and choose End task.
- When reopening the browser, do not restore the previous session.
- Clear browsing history and cached data.
If the page reopens, check notifications and extensions.
Going a Step Further
Remove anything that brings the page back.
- Open the browser’s notification settings and remove permissions for unfamiliar sites.
- Remove unknown extensions.
- Reset the browser to default settings.
- Run a full scan with Windows Security.
- Uninstall unfamiliar programs installed recently.
If you already called the number and allowed remote access, disconnect from the internet, uninstall any remote access tools they installed, run a full scan, change passwords from another device, and contact your bank if you paid.
A Word of Caution
Microsoft and other companies do not show pop-ups asking you to call for support. Never give remote access to unsolicited callers. Report scam sites through your browser if possible.
Final Thoughts
Fake virus warnings are scams designed to frighten you. Close the browser with Alt + F4 or Task Manager, avoid calling the number, clear browser data, and scan the PC.
Keeping your browser updated and using an ad blocker from a reputable developer reduces how often these scam pages appear in the first place.