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Hi Dave Williams.
I understand how alarming this type of pop-up can be. To clarify the situation, did you call the number, share any information, install an app, make a payment or allow remote access to the laptop?
If you only saw the pop-up and closed it without interacting, follow the steps in the AI Answer first. You can then check for anything that may cause it to return:
- Open the browser’s Settings and review Site permissions or Notifications.
- Remove or block any website you do not recognize.
- Review the browser’s Extensions and remove anything unfamiliar.
- If you use Microsoft Edge, make sure Microsoft Defender SmartScreen is enabled under Settings > Privacy, search, and services > Security. SmartScreen helps block known support-scam websites.
If you installed an app or allowed remote access, disconnect the laptop from the Internet. Then open Settings > Apps > Installed apps, sort the list by Date installed and note any unfamiliar application installed around the time of the incident. Please share the application’s name before taking further action if you are unsure what it is.
If remote access was granted or suspicious software was installed, you can also run Microsoft Defender Offline scan from Windows Security > Virus & threat protection > Scan options > Microsoft Defender Offline scan > Scan now. This provides an additional check when a device may have been compromised.
Please do not post passwords, payment details, the full phone number or other personal information publicly.
I hope this helps and please let me know what happened after the pop-up appeared.
If you have extra questions about this answer, please click "Comment".
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