I will try to reinstall the secondary Windows with the F6 driver at installation in approx 1 hour.
As for the strange IDE entry, no it did not disappear, but it seems that the Intel RST driver was not 100% uninstalled. So now I don't have the Intel RST application but just that little driver there which does not BSOD. So the driver is by far not working properly, but at least just half 