1. Create a backup of your computer's registry and system before getting started. This is to ensure that you can restore the computer if something goes wrong. If you make a mistake when editing your registry, your entire system will be corrupted.
2. Delete the process from the Windows Registry. Open your Start menu, click 'Run,' and type in 'regedit.' Press 'Enter.'

3. Double-click the HKEY_LOCAL_MACHINE folder. Inside that folder, double-click 'Software.' Open the 'Microsoft' folder, then 'Windows.'
4. In the Windows folder, open 'Currentversion' and click on the 'Run' folder. Click on 'WildTangent CDA' file (RUNDLL32.exe). Delete the file by pressing 'Delete' on your keyboard.
5. Restart your computer and make sure that everything is working normally. The error should now be gone.