I too have struggled with Acrobat Pro X. At first I didn't know what the issue was, but threads like this have shown me that it is not compatible with Windows 10. There is a version of Acrobat Pro 2020 that you can purchase, but it is at a pretty steep price and I don't know how long that will work - especially with Windows 11 in the future. My solution (that works every time) - pop the CS6 install CD in and reinstall only Acrobat Pro. I don't uninstall the program first, just reinstall and it works fine. It seems like it works for about a month and a half and then I have to repeat this process. A bit of an inconvenience, but it's a fact of life for the moment. Just thought I'd share this in case it may help someone. I will continue to follow this and search in my spare time to see if a solution becomes apparent. I do not mind spending money for a program, but I don't want to spend $500+ and have it not work next year. 🙄