Have you read the description?
It is the MS runtime installer issue. If one of the windows updates is not installed, their runtime installer silently skips a part of the installation process and there's no sane way to detect it.
I'm glad it helped you.
Please, no conspiracy theories :D
It is accomplished with the tech which is already in place, so it was not much work to do.
However, it seems we underestimated the popularity of texture mods.
FYI: DCS currently does support IPv6 except for the master server.
In order to play over IPv6-internet you have to create non-public server and connect by IP (or a domain name, if you have one).
If you play over LAN, most probably you already use IPv6 ;)
https://msdn.microsoft.com/en-us/library/windows/desktop/aa365006(v=vs.85).aspx
Quote: A hard link is the file system representation of a file by which more than one path references a single file in the same volume.
Don't you, by chance, using FAT32 on the installation disk?
Seem like the updater can't write a file bigger than 4GB to the install location.
And that annoying file is around 6GB.