Error opening some PDF documents

Hello Ken,
Thank you for contacting AVG Community Support.
We apologize for the inconvenience caused. We'll certainly check and help you out.
May I know what all AVG programs you've installed on your PC?
Also please share us the screenshot of the error message you are getting using the below article, so that we can check and assist you accordingly.
https://support.avg.com/SupportArticleView?urlname=avg-create-screenshot
You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions.
Thank you and keep us updated.

I am getting this message when trying to open certain PDF files: "There was an error opening this document. Acrobat cannot decrypt this document."

How can I turn off protection so I can tell if this is an error with AVG?

Hello Ken,
Thank you for contacting AVG Community Support.
We apologize for the inconvenience caused. We'll certainly check and help you out.
May I know what all AVG programs you've installed on your PC?
Also please share us the screenshot of the error message you are getting using the below article, so that we can check and assist you accordingly.
https://support.avg.com/SupportArticleView?urlname=avg-create-screenshot
You can post the screenshot here in your topic. Click on Answer & then click on the Image [mountain symbol] & follow the instructions.
Thank you and keep us updated.