When you try to open the Help in Adobe Photoshop CS4 on Windows, the application returns the error "There was an error launching the Adobe Help application. You may need to re-install the application and the Help component."
The Windows registry entries that store settings for the Hypertext Transfer Protocol (HTTP) are missing or damaged.
Log on to your computer as an administrator. Then do one or both of the following solutions.
To set a system default web browser on Windows 7/Vista:
To set a system default web browser on Windows XP:
Disclaimer: The steps in this solution require you to modify the Windows registry. The registry contains system-related information that is critical to your computer and applications. Before modifying the registry, always make a backup copy of it. Adobe doesn't provide support for problems that arise from improperly modifying the registry. For information about the Windows registry, see the documentation in Windows or contact Microsoft Technical Support or your computer's manufacturer.