Hi darin You,
Thanks for your post. We have experienced the similar issues that was recognized as a threat and blocks it. Malware is malicious software, and it comes in a lot of different varieties. Viruses, ransomware, spyware, and more are all types of malwares. Microsoft Defender has powerful built-in features that can help protect your device against malware. Please do start the full scan for all the system by following steps:
How to start a scan for malware in Microsoft Defender
Reference: Getting started with anti-malware in Microsoft Defender - Microsoft Support
Best Regards,
Ian Xue
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