This is a fake browser-based security warning; since you closed it, Windows Security reports no problem, and you did not click RUN A TEST, download anything, or grant permission, no further malware scan is normally needed.
The warning is part of a webpage on the non-Microsoft domain shown in the address bar—not a message generated by Windows Security. Such pages imitate Windows to frighten visitors into clicking, downloading software, enabling notifications, or eventually paying for a service. Microsoft identifies unsolicited browser security warnings as a common technical-support scam tactic.^1^
The absence of a telephone number does not make it legitimate. In this case, the RUN A TEST button is the lure and should not be clicked.
What to do now
- Do not reopen the page or click its button.
- Clear data for the suspicious site from your browser. In Microsoft Edge:
- Open Settings and more (…) → Settings → Privacy, search, and services → Site permissions → All sites.
- Find the unfamiliar site and remove its stored data and permissions.
- Check whether it obtained notification permission:
- In the same All sites area, select the site.
- Set Notifications to Block. Edge documents this exact procedure for stopping notifications from an individual website.^2^
- In Edge, open Settings → Privacy, search, and services → Security and leave Microsoft Defender SmartScreen enabled. SmartScreen checks visited sites and downloads against reported phishing and malicious content.^3^
The location and Internet-provider details embedded in the address are commonly derived from the public IP address and tracking data. Their appearance does not demonstrate wiretapping.
Take additional action only if something was clicked or installed
If you clicked RUN A TEST but did not download, install, or approve anything, close any resulting tabs and clear that site's data and permissions as above.
If you downloaded or ran a file, installed an extension, entered a password/payment information, or allowed remote access:
- Remove the unfamiliar download or extension.
- Change any password entered on that page, using the legitimate service’s website.
- Contact the card provider if payment information was submitted.
- Run Windows Security → Virus & threat protection → Scan options → Microsoft Defender Offline scan. Save open work first because this scan restarts the computer and runs outside Windows, where persistent malware has more difficulty hiding.^4^
Since the existing security check was clean, the Offline scan is unnecessary unless one of those higher-risk actions occurred or suspicious behavior continues.
References