Hello, Thomas Laubacher
Welcome to the Microsoft Community.
Hello, thank you for your feedback on your issue here, the phone number you mentioned [MOD phone no removed] is most likely a scam call.
Please note that Microsoft's technical support team never reaches out to users over the phone or asks them to call a phone number to resolve a problem. If you see a prompt on your computer asking you to call the number, it's most likely malware or a scam trying to trick you into providing personal information or paying a fee.
How to tell if it's a scam:
Unofficial channels: Microsoft will not notify you of a security issue over the phone or through a pop-up window asking for a call. Genuine technical support is usually provided through official channels, such as the official Microsoft Web site.
Unknown phone numbers and links: If the call comes from an unfamiliar number, or if the support phone number and links displayed on the website look unusual or suspicious, it's probably a scam.
Security warnings: Malware often warns you that you need to take immediate action via a pop-up window, usually accompanied by a phone number or contact information, which is also usually a scam.
Handling advice:
Do not call the number.
Disconnect from the Internet to prevent further potential risks.
Run a virus scan: run a full scan with Windows Defender or other reputable antivirus software.
Also the best advice is to reinstall your system to avoid virus messages.
In addition, if you have already called the number and disclosed any personal information, it is advisable to contact your bank or credit card company immediately to monitor account activity and ensure your information is secure.
Best regards
Bobhe | Microsoft Community Support Specialist