How to install and use Delphi 7 and help files on Windows 8/10 or Server 2012.

Installation

Start Delphi setup and install all required items including help files.

In Windows 8/10/Server 2012 or later (should work on Windows 7 too):

Create the shortcut to Delphi32.exe
Open shortcut properties and set "run as administrator" option
Add Delphi to the of DEP (Data Execution Prevention). Go to My Computer - Properties - Advanced System Settings - Performance Settings - Data Execution Prevention
Check that Delphi 7 started correctly
In case of problem set the compatibility "Windows XP SP2" in shortcut options (not recommended)

Delphi HLP files

Since Windows Vista the WinHlp32.exe program isn't more supported. You should download corresponding version from Microsoft web site and install it. For example:

WinHlp32.exe for Windows 7

WinHlp32.exe for Windows 8

Unfortunately, there is no official way to install WinHlp32 on Windows Server 2012 and Windows 10. The only workaround is to copy it from an other system. In my case I take it from my old Windows XP SP3 (32 bits). Later versions extracted from Win7/Win8 packages don't work for me.

You must have administrator's rights to do following actions:

Go to Windows folder
Find existing WinHlp32 file and open its properties
In security tab add your user name with full rights (when disabled, click "Advanced" button and take the ownership over this file)
Rename this file to winhlp32.exe.bak
Copy winhlp32.exe instead

From now Delphi 7 help works fine, and cohabits fine with Delphi XE 10.x on the same machine.