Now comes the most weird thing that I have seen: As the final Windows 10 is out now, I wanted to replace the Windows 10 preview with the final Windows 10. Neither the installation of Windows 8 nor 10 preview produced any problem.
The computer has the following partitions: I have dual boot computer where I can test my software on Windows 8 and 10. I have a hp notebook which has no internal DVD drive, so I installed via an external USB LG Blueray burner.
