If you don't see McAfee or Norton in your apps or Task Manager, it’s almost certain that these aren't real apps. They are browser-based fake notifications, designed to trick you. These probably have scary warnings like "your computer is infected with seven viruses!", or "your computer is in extreme danger! scan now!" These are fake from malicious sites.
Essentially, a website you visited likely tricked you into clicking "Allow" on a small pop-up that said something like "Click allow to prove you're not a robot." Now, that website is sending fake virus alerts through your browser to make it look like your system is infected.
Since you're on a Surface Pro 11, you're likely using Microsoft Edge, but I’ll include the fix for Chrome just in case.
- The Fix for Microsoft Edge
Open Edge.
Copy and paste this into the address bar: edge://settings/content/notifications
Look at the Allow section.
You will likely see some strange website names (e.g., xyz-alerts.com or fast-protect.net).
Click the three dots next to any site you don't recognize and select Remove or Block.
- The Fix for Google Chrome
Open Chrome.
Copy and paste this into the address bar: chrome://settings/content/notifications
Scroll down to the Allowed to send notifications list.
Find the suspicious sites, click the three dots, and select Remove.
Even if you never installed McAfee or Norton, these scammers use their logos because they are recognizable. Because these alerts are coming through the Windows Notification Center (the little panel on the bottom right of your screen), they look like official system warnings.
In both Edge and Chrome settings (under the same Notification menu), you can toggle off "Ask before sending." This prevents any website from even asking to send you notifications in the future.
If the pop-ups appear even when your browser is completely closed and you've cleared those settings, you might have a malicious Browser Extension.
Edge: Go to edge://extensions/
Chrome: Go to chrome://extensions/
Look for anything related to "Adblock," "PDF Converter," or "Search Assistant" that you don't remember installing, and Remove it.