I have just noticed that the reduce noise filter will not reset to defaults. If I make changes to the settings, my settings are retained for next use. Using the ctl or alt key to reset or set defaults does not work. Using the latest version of PS.
What are the default settings for the reduce noise filter?
Reset should reset to what was set when dialogue is open. If you move sliders then hold Alt + click on Reset it will reset, if nothing is changed settings will remain the same. I am not sure what are factory settings, maybe settings shown below on screenshot because I never use this dialogue.