I have recently installed Pro 11-12 on my new laptop running windows 8.1 and received, like others, the error code 20 when trying to email or print.
I have followed the guidelines given to ensure the program is being run in compatibility mode - right clicking the icon, selecting properties, selecting the compatibility tab at the top of the window that appears and then selecting Windows XP service pack 3 in the drop down box beneath the “Run this program in compatibility mode” checkbox. NOW when i click on the "email" tab it jams the program and I have to shut down and restart. Now not sure whether to undo this compatability process - but then I will return to the same problem anyway (ie no ability to email invoices or print)
I have looked at the previous posts re these issues and understand i am also supposed to try assigning PDF converter to its own port but cant find instructions on how to do this for Windows 8.1 (the link on the community is for earlier versions).
Help ....