Follow these steps to secure PDF files with password protection and restrictions on Windows.
Download and install Softaken PDF Protector on your Windows PC. The software has a simple interface to browse PDF files and apply security settings.
Softaken PDF Protector has a very simple user interface. After launching, you will see the main screen as shown below:
The security window contains four checkboxes — set them as needed:
Users can set all the above options by their choice.
Browse PDF → Secure PDF Now → choose restrictions → set password → browse output → click Generate PDF. Download the free demo to try before purchasing.