You can use WPS Office to make your PDF restricted with edit restrictions. If the user applied password for this, then no one is able to edit your file. If the user have files in bulk then you need a trusted automated tool. In this scenario the technical experts of SysTools give their Best PDF Lock Tool.

Steps to use this method.
Step 1. Download the software to your computer.
Step 2. Add files to make them secured.
Step 3. Click Next and select encryption after entering password.
Step 3. Click the Lock Button from your window.

Please tell the best methods that can make PDF secure from unwanted changes.

There is no manual or online method that can remove the forgotten password from the PST data file. So, you need a trusted tool that can easily remove the older or present password protection from the Outlook Data File. In this way the SysTools PST Password Remover Software is best for data security and in using. It also can remove protection from thousands of PST file in one go with in minutes.

Use SysTools PST Password Remover to complete this task. Thousands of PST files can be added to this tool at one time to unlock. It also provides a demo version that is absolutely free.

Steps to use Automated Tool.

1. Download PST Password Remover Software.
2. Add Password Protected PST files.
3. Click Remove Password to unlock.