After closing the browser, it would not re-open. It appeared in the Task Manager, ut I couldn’t stop it at the task manager either, but when reviewing the Properties, the process had the Brave badge but was called “old_chrome.”
It could not be stopped, permission denied. It could not be taskkilled.
However, I was able to rename it, accepting the warning that popped up. I just stripped the .exe from the end. After reboot everything was fine again.
I wonder if this was some kind of exploit rather than an official Brave file. I couldn’t find the renamed executable after I rebooted, so perhaps it was dynamically generated.