This option helps you protect your data and hardware against malware-ridden PDF files. Protected Mode is a security feature that automatically blocks files that contain malicious code.

Locate the option that says Enable Protected Mode at startup and disable it.ĭon’t forget to re-enable protected mode at startup after you finish editing the PDF file.

Then go to Preferences, and select Security (Enhanced).

Launch Adobe Acrobat Reader, and click on the Edit menu.

If the error persists, try using a different browser and check if the error persists. Go to log in and open the problematic document. You can also edit and sign your PDF files using Adobe’s web app. Restart the program, and check if you can edit your PDF documents without getting any unexpected errors.

Launch the program, click on the Help menu, and select Check for updates. If you’re running an outdated Adobe Acrobat version, check for updates, and install the latest app version. You can use the Task Manager to close background programs. Third-party programs might sometimes interfere with Adobe Acrobat Reader. As a quick reminder, the Print to PDF option flattens the file and resets all the settings to their defaults.īy the way, if other apps and programs are running in the background, make sure to close them. Save the new file, then open it, make the necessary changes, and check if the error persists. Go to File, select Print, and select Adobe PDF or Microsoft Print to PDF as the printer.

Try recreating the problematic PDF and check if the issue persists. Fix: The Operation Failed Because Adobe Acrobat DC Encountered An Unknown Error Recreate the PDF

Adobe acrobat reader 2017