galaxycommunication.exe wont run unless the galaxy is installed on the computer.
And galaxy is not part of TW3 so it wont be running for people that simply download TW3 and install it directly.

as example I have not installed galaxy and it is not running in my computer. It simply can not because that binary is not to be found anywhere on my computer.

/regards

No, it is not.

Well - we can speculate what this is, but for now it's an empty web space...

Will it be for achievements? Or maybe active (add-on) content? Maybe an multiplayer expansion (very unlikely)?

Who knows... It is intriguing though.

What are you talking about? An empty web space?

I think he is talking of the IP address the game is phoning to when started.

i.e. http://ks384123.kimsufi.com/ or http://46.105.121.139/

That is the empty web/home page/space.

That is a server address. It will always be devoid of web content. The home page, as I have already stated, is http://www.ovh.com/ .

I think it's actually Galaxy Client connecting through game executable (thanks to Galaxy.dll).
It sends syslog logs to their server, I would say it's very close to spying but they probably do this to gather user data to improve the client.

Look at attached screenshot.

wonder what it does on a PC setup (like mine) without galaxy installed (and thus the galaxy client).
Will the game then do noting or or communicating all by it self.

I have no experience with using Wireshark (or other packet sniffing tools) and am not sure I have the knowledge to test with it correctly. (will maybe try that next week)

/regards

I just noticed that you can see your friend in-game location (for example, Oxenfurt gate) below usernames on friend list. This might be related to this connections.