Chashan: Via Eisenwald.exe you mean? All that does is open the launcher to the same effect.
Sometimes launching the game without Galaxy picking it up works, guess it doesn't with LoE (I'm sorry I couldn't check as I don't have Galaxy installed).
Another thing I can suggest is have you tried adding the game to your anti-virus ignore list and then seeing if the game will run after the launcher?
Also, have you got the game installed in C:\Program Files (x86) or C:\Program Files? If so, reinstall the game somewhere else, for example C:\GOG Games as there can be problems when games are installed in Program Files.
One thing I do remember from ages ago is that I actually had a problem with the game immediately crashing after trying to start it and what I did to fix it was rename the Galaxy.dll file found in the LoE folder (to Galaxy.unused) and the game started up and ran perfectly. Might be worth a go as a last resort.
Hope something here helps.