1. Click on the 'Windows Start Menu.'
2. Type 'regedit' into the 'Search Programs and Files' box, or if you are using a version of Windows prior to Vista, click on 'Run' and then type 'regedit' into the Run box and click 'OK.' The Registry Editor opens.

3. Click on 'Edit' and then 'Find.'
4. Type 'HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/Currentversion/Run' into the box and click 'Find Next.' Alternatively, you can navigate to the registry path in the left pane of the Registry Editor.
5. Right-click on 'WildTangent CDA' in the right pane of the Registry Editor and select 'Delete' from the context menu that appears.
6. Close the Registry Editor and restart your computer.