Currently Being ModeratedMar 20, 2013 7:23 PM (in response to dream-walkers.de)
Hi, your English is quite good actually!
First, Safe Boot , (holding Shift key down at bootup), use Disk Utility from there to Repair Permissions, test if things work OK in Safe Mode.
Then move these files to the Desktop...
Reboot & test.
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.