It used to be that almost every Windows power user replaced Windows Explorer with some other file manager/browser pretty much as soon as the machine booted after the installation of the OS. A lot of them still do. I, like many, fell out of the habit and limped along with Explorer.
This morning a listener sent me an email asking about Windows Explorer replacements and I went out hunting. There are still hundreds of them under all sorts of licenses from proprietary, pay for it, to the GPL. Lots of them are freeware. The link above will take you to the home page of Free Commander, which I recently installed and recommended in my answer to the listener's query. I pass this along in case some of you miss the good old 2 pane file managers. Much to my surprise, I did and am now happily using Free Commander.