If the device changed is a volume (like a CD) or a port (like a serial port) Windows broadcasts a WM_DEVICECHANGE notification to all top-level windows.[2][3] Windows calls this a "basic" notification. A top-level window is one which is a descendant of the desktop.
my Problem was:
Computer doesn't start in Normal Mode ->
solved this Issue by installing autoruns.exe(from MS) in Compatibility Mode and disabled some Programs.
Then the Computer start normal but very very slow.