"Re: Pro Series 2009 error message : failed with error 1114: A dynamic link library(DLL) initialization routine failed"

Purchased new computer.

Walked all programs over from old computer to new  computer thru software.  All years of proseries opened up except tax years 2009 2010  & 2010

The years before 2007&2008 opened up

The years after 2011 thru 2019 opened up"

Got a bad .dll file somewhere.  Uninstall and reinstall from your Intuit Online account, rather than through the software.