Well I did what you said and I could not find the "hide known file extensions"
I'll post a picture in a second...
EDIT: Here is a picture of my control panel to view. It doesn't have what you said on it, unless it was "Hide Extensions for known file types" in which case then that is not the problem as I have already unchecked it and tried it out, and it still did not work...
I'll post a picture in a second...
EDIT: Here is a picture of my control panel to view. It doesn't have what you said on it, unless it was "Hide Extensions for known file types" in which case then that is not the problem as I have already unchecked it and tried it out, and it still did not work...