Why does the content prep dialogue box keep popping up and how do I turn it off, please?

Hi @johnb85527502 

Sorry to hear about the trouble caused.

When setting up documents for reflow, this message may be displayed. Changing the preference within Reading allows Acrobat to process the current page only.

Please try the troubleshooting step suggested here : https://helpx.adobe.com/acrobat/kb/message-content-preparation-progress-opening.html

Let us know if it doesn't help!

Thanks,

Akanchha