Thanks for your tips Valamar!
It seems, that the "yellow box" bug disappered.
But i have new infos for these "features".
It also seems, that in the morning the crash is not so often like in the afternoons or evening.
It also crashes now not always at the progress bar anymore, sometimes yes, but now i can force normaly a crash travelling by horsemaster or map (to Rohan OR to a place whatever, makes no difference) and after a few seconds THEN i get a crash, just walking around, right click an npc or whatever. I can crash the game, just travelling around.
I must admit that i still play on highest graphic, i just switched off the two lighting switches.
Playing on a ram disk is not a solution for me, i think its Turbine's move.
But i try the default graphics by now and will report here.
Last edited by Celimat; Feb 25 2013 at 10:46 AM.