Greetings Info_Tech!
Yes I do Common Files, Documentation, and the Internet Information Services snap-in, I think. When I searched ".msc" on my computer, I did find that I have duplicate .msc files: in the folders
C:\i386, C:\Windows\System32,
C:\WINDOWS\system32\Com
C:\WINDOWS\system32\inetsrv, C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322,
C:\Program Files\Microsoft.NET\SDK\v2.0\Bin,
C:\Program Files\Common Files\Microsoft Shared\web server extensions\40\bin,
however, I realize that these .msc files are all MSC documentation files.
The only files that are not duplicated are these files:
iis.msc and inetmgr.exe in C:\WINDOWS\system32\Inetsrv,
iis6.msc and iisui6.dll in folder C:\WINDOWS\system32\Inetsrv6.
inetmgr.exe opens the IIS console, but message says "There are no files to show in this view.
iisui6.dll shows as a IIS MMC Snap-in module. Can I assume that I need to install this snap-in? What should I do next?
(I hope this was not information overload

)