Over the last several months, I have started getting messages pop up when editing pdf files. One is "This action cannot be completed because the "filename.pdf-Adobe Acrobat Pro" program is not responding. Choose "Switch To" and correct the problem". The other is "Content Preparation Progress. Please wait while document is being prepared for" and shows a progress status bar. One last issue I've noticed is adobe is quite frequently hanging up and shows" Not Responding". I've had Adobe Acrobat X Pro for several years and these have not always occurred, only just over the last few months. I'n not an Adobe expert so I'm not sure why this is happening. I've checked for updates. Any advice on what's going on?
Could you please let me know the OS version on your system?
Please let me know does this happen with all the PDF files you try to edit or with specific PDF files?
Please refer to this KB Doc : https://helpx.adobe.com/acrobat/kb/message-content-preparation-progress-opening.html and Troubleshoot Windows system errors, freezes | Adobe software .
Also please try repairing the installation by navigating to Help>Repair installation.
Let me know if this helps.