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I'm an old-timer experienced Windows user from way back. My main computer is a Windows 7 Pro box. We bought a new PC for a new office; it of course has Windows 10 (Home) on it. I was doing some work on the new PC and wanted to send the result of what I was doing -- the IPv6 address of a printer -- back to the Win 7 PC. I wanted to use NET SEND but that isn't available on Win 10 (or Win 7 as it turns out).

Research found that the MSG command is supposed to (sort of) do what NET SEND did in the old days. A web site sample showed a command prompt window with the current directory being C:WINDOWSSYSTEM32 and showed the result of MSG /? giving the syntax of the command -- just what I wanted.

But running MSG /? on the Win 10 box said that MSG was not recognized as a command. (It works on Win 7, with MSG.EXE being in SYSTEM32.) A bit of digging found MSG.EXE in a directory under WinSxS --

C:WindowsWinSxSamd64_microsoft-windows-t..commandlinetoolsmqq_31bf3856ad364e35_10.0.17134.1_none_0ea9fdb9152f846c

but it doesn't run right even with that set as the current directory. Something needs to install it, it seems -- tho there was nothing about doing anything like that in the online sample that I had found.

I checked "Programs" (what used to be "Programs and Features") and did not see it as something I could install.

What's going on? How do I make this usable? What other commads need to have the same kind of magic done so that they work from a normal command prompt?

Thanks for any assistance.

Running MSG /? on the Win 10 box said that MSG was not recognized as a command

We bought a new PC for a new office; it of course has Windows 10 (Home) on it.

Home editions of Windows do not include msg

Source Msg - Windows CMD - SS64.com

What other commands need to have the same kind of magic done so that they work from a normal command prompt?

That question is "too broad".

You are apparently using on all computers the Home version.
This version does not include the MSG command.
The command is only available in Windows versions starting from Pro.

As a side-remark, tested on Windows Enterprise, even the old "net send"
command still exists in that version.

By all reports, trying to transplant msg.exe from higher Windows versions
to Home does not work, so there is no easy workaround.

You can however write your own.

By using the free
psexec
you can execute code on remote computers that creates a pop-up message.

See the post
Show a popup/message box from a Windows batch file
for a few ideas.

The niftiest ones I found were:

• 
  

  mshta.exe, the runtime engine for Windows .hta HTML applications,
  accepts a general URL as command line argument, including a javascript:
  protocol URL. So you could issue an alert with a timeout of 10 seconds this way:

  
  
  

  mshta "javascript:var sh=new ActiveXObject( 'WScript.Shell' ); sh.Popup( 'Message!', 10, 'Title!', 64 );close()"
  
  

  
  


• 
  

  Using a VBScript file and call it using CScript,
  with something like the following in a .vbs file:

  
  
  

  Set objArgs = WScript.Arguments
  
  messageText = objArgs(0)
  
  MsgBox messageText
  
  

  
  

The MSG program is only available on Pro or Enterprise versions of Windows.
It's main intend is to notify users on a terminal server or similar stuff. It requires certain rights normally only available to administrators (normal user can be given the right to use it) meaning its main intend is to be used by windows Administrators to notify users about an shutdown, problem, etc.



The subfolder inside of WinSxS is from an Windows Update. Microsoft calls this folder "Component Store" and more info about it can be found in this article:
https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/manage-the-component-store


I was able to find the same folder with msg.exe on my system. Looking at it, it doesn't seem like its an valid .exe file at all, its starts with "DCS" when looking at it in an hex editor but should start with "MZ" if its an executable file. I was not able to find any documentation about this "DCS" header.

Alternatives would be simply sending an mail and opening it in your web mail client if both computers have internet access. Windows 7 and 10 also both come with an feature to offer assistance to other people, it can be opened by starting msra.exe If that method does not work you could use other remote management tools like Teamviewer. Teamviewer has an option to use LAN only connections meaning no internet is required to use it on a local LAN.