When only the keywords and not the table of contents appear in "Help -> Help Topics," the Windows help system might not be able to find the dviout.cnt file.
The information in the dviout.gid hidden file (file created automatically by Windows) in the directory containing dviout.exe might be in error.
When the directory is c:\dviout and
attrib c:\dviout\dviout.*
is specified in the DOS window, the existence of that file can be verified.
This can be handled by deleting
attrib -H c:\dviout\dviout.gid
del c:\dviout\dviout.gid
In the Explorer, switching the radio button "display all files(S)" ON in a tag appeared by "display menu bar(V) -> Option(O)", the above deletion is also possible.