Keyboard focus on first file in Windows explorer?

Solution 1:

The space key selects the first folder or file in the list.

Solution 2:

I faced the same problem so I created a simple AutoHotKey script to solve this problem

~Enter::
    ControlGetText path, ToolbarWindow323
    Sleep 100           
    if WinActive("ahk_class CabinetWClass") {
        ControlGetText new_path, ToolbarWindow323
        if (new_path != path) {
            SendInput {Space}
        }
    }
Return                        

Solution 3:

This workarround may be helpful try using Enter to open a folder then PageUp to select the first file/folder the key page up will select the first subfolder on the opened folder