I now switched to another software for creating the virtual hot spot, it's called 'MyPublicWiFi' - is has basically the same functions as Intels Dashboard.
MyPublicWiFi - Virtual Access Point
In contrast to 'Intel Dashboard' this one works, it's also able to create an hotspot automatically after booting windows.
Sadly as it's the case with Dashboard, the connexion only works reliable using the 802.11g mode. Using the Intel Centrino 6205 WLAN card in 802.11n-mode results in lost packets and unstable connexion.
When I can expect an fixed driver? Regarding the other problems I read about that WLAN card it shouldn't be that problematic to reproduce the problems in the lab.