How to Unprotect PDF
PDF files protect business documents from being altered by end users. The file format is commonly used as a method for file distribution on the Internet. If you have the administration password for the PDF file, you can remove the password protected encryption, so changes to the file can be made on your desktop. Removing the password encryption "unprotects" it and gives you access to edit the text and images in the file.
Click the Windows "Start" button and select "All Programs." In the list of menu items, select "Adobe Acrobat" to open the editor software.
Click the "File" menu item and then select "Open." Click the "Browse" button to select your PDF file. Click the "OK" button.
Click the lock icon on the "Tasks" toolbar. Select "Remove Security" from the list of menu items. Enter the administrator password when prompted. Press the "OK" button to remove the password protection on the file.