Hi Mike,
Snapins have been around since NT5 & Win2k; especially on Server machines such as Server 2000/2003/2008 etc. Not sure about this fix, I'd have to take a look and see what comes up on my W10 laptop and report back. It's certainly possible that W10 removes certain snapins upon upgrade or clean install as we've seen with the REMOVAL of WLM app. on Win7/8/8.1 machines. No rhyme or reason to that.
You didn't mention in your post what version of W10 your friend is running? Is he on
W10 Home, Pro, or Enterprise?
Saw this note in your link:
NOTE : This is applicable only for Pro and Enterprise editions of Windows.
So, if he's on either Pro or Enterprise W10, I'd expect to see this, and the fix sounds like it will work. I don't have those versions installed unfortunately, so can't test for you on those.
If he's in W10 Home, sounds like he shouldn't be getting that message at all.
You do know that there are a bunch of snapins installed in earlier versions of Windows going back to Win2k and even some before. Examples are
DEVMGMT.MSC, APPWIZ.CPL, RSTRUI.EXE, etc. These are handy cause you can launch the snapins from the W10 start box or Cortana or Run... I use these frequently as they are real timesavers. Then there are the more esoteric snapins such as the SNMP TRAP CONSOLE, etc.
Cheers!
*Marc*