Based on the above description, I understand that PDF files are not opening and when you try to print you get a message that can not load library LXDAPRP.DLL error code 126. I will be happy to assist you.
I would appreciate if you could answer the following questions:
1. Have you made any recent changes to your computer?
2. What is the make and model of your printer?
3. Can you print a word file?
Here are some troubleshooting steps that you can try to resolve this problem.
Method 1: Run the printer troubleshooter.
A troubleshooter is an automated tool that can find and automatically fix some problems with your PC. The printing troubleshooter can fix problems with installing a printer, connecting to a printer, and errors with the print spooler—software that temporarily stores print jobs on the PC’s hard disk.
Method 2: Uninstall, reinstall printer drivers and software.
For detailed instructions, refer to the suggestions from this link.
If you face any further issues, please reply to this post and we’ll be happy to assist you further.