Hi,
it seems Windows Defender recently decided to flag Tor.exe, part of TorBrowser as a trojan. You said you disabled that, but did you check it hadn’t already deleted/quarantined that file before? It should be inside <path to your TorBrowser installation>\Browser\TorBrowser\Tor\
p.s.:
- Run as administrator
Please don’t do that, a browser (or most software, actually) shouldn’t need to run as administrator, and doing so can represent a security risk.