I am not even sure it's the case. In explorer options, search, both "include compressed files" and "always search file names and content" are unchecked by defau

I am not even sure it's the case. In explorer options, search, both "include compressed files" and "always search file names and content" are unchecked by default. And from the behaviour it seems to only search file names indeed. I suspect it has more to do to explorer registering something with the file system to be notified if any of the folders being searched change or something like that. Something completely useless in any case, I'd much rather it doesn't do anything smart and gives me a result instantaneously.