A-PDF Restrictions Remover can help you remove all restrictions imposed by the owner on the PDF file. See more at: http://a-pdf.com/faq/how-to-remove-pdf-files-restriction-for-opening-copying-editing-and-printing.htm

2. After I downloaded a PDF file from a
website, I was not able to copy or print the
content, let alone do editing. Is there any
way to remove the restriction for copying,
printing and editing?

3. You can try A-PDF Restrictions Remover. A-PDF
Restrictions Remover can help you remove all
restrictions imposed by the owner on the PDF file.
And in a few seconds, you are able to copy, print and
even edit the encrypted PDF file.
Besides, this restriction removing software can help
you remove the user password with ease, but the
premise is that you know what the user password is.
Below I will show you how to remove restriction on
opening, copying, printing and editing a PDF. There
are two ways to do this with A-PDF Restrictions
Remover.

4. Start A-PDF Restrictions Remover, and then you can
click "Settings" to backup the PDF file and set Password
Pool for removing user password.

5. Click "1Remove Restrictions…" or "2Remove Restrictions
& Save as…", and then in the pop-up window, select a
PDF file that you want to remove restrictions and save it.
Soon you will get a new PDF file with no restrictions.

6. This is a quick way to remove restrictions. You just need
to right click on the PDF file and you will see the below
window. Select "Remove Restrictions" or "Remove
Restrictions & Save as…", and soon you will get a PDF
without restriction.