Fatal Error message-Acrobat failed to connect to DDE server. Just got computer back from being cleaned. Not sure if that has anything to do with it. After clicking "Open" on a PDF doc, nothing happens. I have Windows 10. Not sure if I need to update or how to update.
Could you please confirm the exact version of Acrobat DC you are working on? Open Acrobat DC>Help>About Acrobat.
Since you have mentioned that the error message pops up Acrobat failed to connect to DDE server. So we suggest you to look into the help article and follow the troubleshooting steps suggested- Fatal error - Acrobat failed to connect to a DDE server