The following are just information, even many people might know the details very well.
$1. For "Microsoft Outlook 2010"
The file(s) ".hlp" and/or ".chm" cannot be attached to "Microsoft Outlook...

Hi, Dr. DavidY,
Following are basically same as those of "Title: From the technical viewpoint, is the information by M$ enough good?" written by me. But the understanding might be easier because of...

Hi, Dr. Mystere.
I think you might well know, but here is just an example to convert the HLP file to the PDF file. Please refer to the attached pictures.355783557935580

Please refer to the following pictures.3540035401

Comparison between the "winhlp32.exe" for Windows 8.1 Eng x64 (*1) and the "winhlp32.exe" for Windows XP Eng x64 (*2):
(*1) = The "winhlp32.exe" for Windows 8.1 Eng x64, which can properly open an...

Please refer to the attached pictures, which might be easy to understand.3525035251

SUPPLEMENT-3:
(1) First, get a file for Windows XP (x64) by,
​[REMOVED UNAUTHORIZED DOWNLOAD LINK]
Note:
Press the "Download" button (light blue button), locating below the item...

SUPPLEMENT-2:
(1) First, get the service pack SP3 for Windows XP (x86) by,
https://www.microsoft.com/en-US/download/details.aspx?id=25129
Note:
You can get two downloaded files (by...

In the case of “Windows 8.1,” an old help file (*.hlp) can be read by applying the "Windows8.1-KB917607-x64.msu [for Windows 8.1 (x64)],” or, "Windows8.1-KB917607-x86.msu [for Windows 8.1 (x86)],” to...

[My comments]
(1) Regarding the "winhlp32.exe" contained in Windows XP [SP2] (x64), I think you cannot easily find the "Windows XP (x64) PC."
(2) However, I think you can still easily find the...

[My comments]
(1) Even replacing the original "winhlp32.exe" (contained in Windows 10) with the "winhlp32.exe" (existing in the Windows directory of Windows 7, 8, or 8.1), you cannot read an old...

How to read an old “.hlp file (*)” on Windows 10 (x64, or, x86)
(*): The “.hlp file” must be read, without any problem, on Windows XP, 2000, ME, or, 98/98SE.
The following is a procedure to be...