Hello Maro44,
It depends on your motherboard...but try the following options:
1. Connect your HDD to Sata 0 on your motherboard. (Do not plug any other disc drivers, USB, SSD for now, just your HDD). Then boot the computer and keep an eye open while the system boots up. Be ready to hold F2 or Del to go into your BIOS. Once in your BIOS, simply check to ensure the HDD has been detected. Assuming it's detected, exit the BIOS and turn off your PC. Now connect your DVD burner (make sure the power cord is also properly/firmly connected too), plug in the DVD Burner to SATA 1 and turn on your PC. Again, keep an eye open during the system boot-up and get back into the BIOS. As before make sure the DVD Burner is detected, if it is, then set it as the "Boot Drive". Then save and exit the BIOS.
Now, place your OS installation disc in the DVD burner and reboot the system. The Windows installation process should start automatically... 🙂
2. If the above doesn't work, simply switch the SATA connections. In other words, connect the DVD Burner to SATA 0 and the HDD to SATA 1.
I hope the above helps you Maro44. Good luck