Hi mpv191 and welcome to cdfrreaks.
Yes, it's likely that dvd43 will cause conflicts.
First remove via control panel > add and remove programs.
Then navigate to your program files and dvd43 folder and delete all files there...eg., C:\Program Files\dvd43.
This, hopefully will do it, but you may have to run a registry cleaner.
If you need one, click on the regseeker link in my sig.
Hope this helps.