cdaEngine0400.dll has earlier been reported as spyware, but new reports show that newer versions of the file is clean. We still don't have the file though, and only provide removal instructions. 

Uninstall notice for WildTangent 
Notice that removing WildTangent may cause the program that bundled 
it to not function as intended. 

Uninstall procedure 
Uninstall WildTangent from "Add/Remove Programs" in the Windows® Control Panel. 
The vendor is also offering uninstall instructions. If you run into problems 
uninstalling, please contact the vendor for support. Note that you will not 
be able to play WildTangent games if you decide to uninstall. 

Earlier versions of WildTangent's uninstaller leaved a large number of files 
in the "%WinDir%\wt\" folder which can be deleted manually after running the 
uninstaller. 
Note: %WinDir% is a variable (?). By default, this is 
C:\Windows (Windows 95/98/Me/XP) or C:\WINNT (Windows NT/2000).