Okay I'm a bit frustrated now. The game crashes and crashes and crashes nonstop. At first I thought these were only rare occassions and coincidence, but now I'm happy when I am able to play 10 minutes in a row without a reboot. I'll try to describe it as detailed as I can:
At the beginning it was all fine, it first started after venturing deeper in the dungeon and making some good progress. The cause of the complete reboots is the sound of the floorplates, switches, putting keys into locks etc. I think you know what I mean. That soft triggering sound which should be familiar to everyone. I step on a floorplate the sound kicks in and my screen turns black and I hear the triggering sound repeatedly like a machinegun for about 1-2 seconds and then it stops and my computer does a full reboot. It is NO other sound only that triggersound!
I'm closing my eyes and pray each time inserting keys into locks and stepping on floorplates, always aware it could crash again. As long as I'm walking around and don't have to push any buttons or do something else that would result in that sound, everything is fine. I have no idea why it was alright at the start and now happens every few minutes. Sometimes I'm not more than a second into the game after a reboot, when it crahes again.
That crashing cost me a savegame once. I couldn't reload save no. 2 after a reboot, it always kicked me out to windows when I clicked it, so I had to take another savegame.
I think I'll pause Conflux now and try another custom dungeon to see, whether the problem occurs there also at the triggersounds of switches etc. Note that I hadn't this problem while playing CSBwin before Conflux.
Don't know what to do, it is so annyoing. I'll keep you updated.
EDIT: I already deleted the whole Conflux folder while backuping my savegames and reinstalled it. Several times, but it didn't help.