Hi,
If You had more than two SSD/HDD during installation: then the drive who is attached to the first SATA port (0) will have the boot partition on it and Windows installed.
However, If the boot drive is mounted as disk (1) and another drive is attached to
any other SATA-port: regardless - Windows will be installed on the other drive.
If this is the case, make sure to change the boot order in BIOS Setup.
Meaning the drive other than the Windows drive will have to be in the first boot-order, otherwise Windows will not start.
Now, there are solutions to this.
Download and run
http://www.softpedia.com/get/System/OS-Enhancements/EasyBCD.shtml
That is the reason I will always suggest to only have one drive connected during Windows installation.
If this was the problem in the first place...?
Best regards from Sweden