I have looked at the various responses regarding the dropbox file for Realtek 8723. I have also read the response on commenting out a certain line, and also another response in regard to being able to delete a space in the file directory. However, I have tried, to the best of my ability, to do these, and when I unpack the DropBox file from Realtek, I receive two error messages. Please, can someone explain in simple terms how to fix this? I want to use Ubuntu instead of Windows, since everything else is working well, but not this.