Cseries :: C6-01 Camera Unexpected Error Occurred

I am having this problem with my camera on my c6-01 phone since some minor update before Anna. I dont know which update it was, but this is not important as I have updated to anna anyway (hoped to fix that by anna). But the problem persists.When I switch on the camera (by any method), it shows this error. I have tried to restart the phone, to reset the phone, to reinstall anna, nothing helped.Neither of the two cameras is working, in any application, nor in the video call, simply never.I have red somewhere, that there should be some (config) file in c: which if missing, is causing this problem, or if is corrupted, but I do not know what file it is.