The .hlp files used in E-Prime 1.x do not work in Windows Vista or Windows 7 because WinHlp32.exe is no longer shipped with these Operating Systems. Here is more information from Microsoft:
Users who want to view 32-bit .hlp files must download the program from the Microsoft Download Center, and then install it on their computers. Users who have not installed this program on their computer will be directed to a help topic in the Help and Support application. To download WinHlp32.exe, visit the following Microsoft Web site:
Windows Vista - http://go.microsoft.com/fwlink/?LinkID=82148
Windows 7 - http://go.microsoft.com/fwlink/?LinkID=166421
Note for Help content providers who are shipping .hlp files:
The WinHlp32.exe technology is officially obsolete, starting with the Windows Vista release. The WinHlp32.exe technology will not be supported in its current form in future Windows releases. Therefore, we strongly recommend that software developers stop using the Windows Help application in Windows Vista and 7. Software developers who ship programs that rely on .hlp files are encouraged to transition their Help experience to an alternative Help file format, such as .chm, .html, or .xml. They will also have to change their calls from the WinHelp() API to the new content source. Several third-party tools are available to help authors convert content from one format to the other format.
This article applies to: