Microsoft Defender Flags Tor Browser as a Trojan and Removes it from the System - Deform

A little context, one of the larger exit nodes was compromised and would send malware to your computer. The behavior shield probably caught this and correctly marked the program as a trojan, since, by definition, that's literally what it was acting as when connected to that node. More advanced AVs (like malwarebytes) will instead block the malicious connection rather than blanket-banning the entire program.