If you are having a [highlight]secured[/highlight] PDF file, for which you don't know password to make edits. This post is for you. I was having this problem in editing a PDF file, it was a secured file, after doing a bit of research I found this PDF password remover software, this takes less than a minute to remove password from secured PDF files. The download link to this software is given at end of this post. You can also read this guide, if you are having any problems removing password from a secured PDF.