Go for a nice new fresh installation of windows10
get a usb thumb drive (empty)
https://www.microsoft.com/en-gb/software-download/windows10
Make sure your SSD is also empty and your data backup up.
then uplug your HDD (just to be on the safe side
) and then plug in the usb drive and installing it is a doddle
if you do run into any issue's just plug your HDD back in and come back here for help, make sure you take photo's of the stage your having problems with etc etc makes our life easier.