Ok twg. I'm doubtful this will make a difference but I'd try this anyway.
Can you right click a .wmv files and select "properties" in the menu, then there should be a button that says "change" and set it to windows media player. I don't know what the words in " " will be in German.
Try to play the game and see if it will play.
I know you said that you've gotten no errors. Sometimes we can find clues in event viewer.
This should work as Windows core files are in English (once had to repair a German corrupt Windows Xp). Go to Start and Run, type in eventvwr and see if you can find any errors related to Divinity2.exe
In the left pane "application" or German equivalent should be highlighted.
Look for red circles with an X in them.
See if there are any errors being logged in there.
I'm looking for stuff related to divinity2.exe, vlc, and windows media player (wmplayer.exe) as they can be conflicting. I'm not sure what the .exe is for vlc.
If you see lots and lots of errors, there might be more going on with your computer then just the game failing.
I'm expecting stuff like this, only will be related to divinity2.exe instead of winamp.exe
Faulting application winamp.exe, version 5.1.1.143, faulting module ntdll.dll, version 5.1.2600.5755, fault address 0x00010717.
For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.You can click and highlight the text. While it is all highlighted in the window press CTRL and C (keyboard copy command) and you can paste the contents in your forum post. Sometimes you'll have to try this copy method two or three times for the stuff to copy, but it does work. For some reason Micro$oft doesn't have an easy right click copy command in here.
After this it will be more up to Larian staff to assist you, I'm running out of ideas but will still give it my best.
