Win10 open hlp file error prompts unsupported help what to do?

After upgrading to win10, I can't open all the programs, with the help file of hlp, there are 2 solutions, I prefer the simple but troublesome one, let's take a look.
1. When you click on the old program, open the help, but you are prompted: Error opening the help in the Windows-based program: "Do not include the function" or "Unsupported help".

2, mainly win10 will help upgrade to cloud storage, so the future help files may be opened on the web page, and the Winhlp application is blocked. You can copy a program called winhlp32.exe on the system before win10 (winhlp32 can search and download by yourself).

3. After obtaining winhlp32.exe, store it in the system disk (C:windows) directory.

4, but you will find that when you replace the file, you do not have permission to do such an operation.

5, you can right-click on the folder, in the security, add your own account for the current user, and give "full control" to "ldrustedInstaller".

6, because the above steps can fundamentally solve the problem that can not open the hlp file, but I think the operation is troublesome, usually with hlp help files, there are fewer cases, so I solved this: click to view Hlp, click on the left mouse button and drag it to winhlp32.exe.