This message can appear if:
The converter was not properly registered.
The converter was inadvertently deleted without removing the registry information.
The converter support files are corrupt.
The converter installation was removed and the uninstall tool did not finish clearing the registry settings.
The hard disk is damaged where the converter files were stored.
Usually, reinstalling the converter will overcome this problem. If the converter reports that it is already installed, first uninstall it so that the setup program can remove the files and registry settings.
If removing and reinstalling the converter is not successful, there may be a problem with a resource on the computer (for example, an executable file that is needed to properly register the converters on the computer has failed or stopped running). In this case, it is best to turn off the computer and start over.