I am having the same problem with all of my PDFs that I open in Adobe Acrobat Pro Version 23.8.20458.0. I work with as many as 15 different PDFs per day. I can try to print or just hit a down arrow to try to move to the next page and it hangs with the not responding message. It always recovers and becomes usable after about 20 seconds, but it is EXTREMELY ANNOYING and definitely below the otherwise excellent performance of all my other Creative Suite applications. It almost feels like the app is trying to log on over the internet to check the status of my subscription before proceeding. I have updated to the latest version and even did a complete uninstall/reinstall but none of that fixed the problem. Please help! - Jon Bjork