Sometimes, we set pdf password to prevent from editing, copying, printing etc when creating pdf files. On one hand this may protect our copy right. But what should you do if you forgot these password? When you get a lot of locked pdf files, you can't change it , it may make you crazy. Then I will share a wonderful tips for you to unlock bundle pdf files at the same time. 1. Log in your computer and download Advanced PDF Password Remover and install in that computer. 2. Click "add" and select your files to the program, you may need to specyfic the files output settings. 3. Begin conversion, a few minutes later, it will show you a massage about your files password have been removed successfully.