• We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
Showing developer posts only. Show all posts in this thread.
Follow the manual uninstall instruction in the sticky thread on the subject.
 
Then you have not removed everything, since if you had the CD would not have any reason to think the game was still installed.
For DD you may have to alter the Uninstall instruction to conform with the different DD install.
Example Doomsday instead on Hearts of Iron ...
 
The manual uninstall instructions cover the three areas you need to delete stuff.
The folders, the installshield and the regisrty.
If you clean out all three of those of any Mention of DD, Doomsday, HOI2, Hearts of Iron 2, then you should not have a problem.
Run searches on all those terms in all three areas to find the problem.