Im Sorry, I dont know what this means.
EDIT: After writing all this I see your saying your keyboard and mouse doesn't work. Pull the board out of the case and test it. You probably
shorted the USB somehow
If you can get to the BIOS and your keyboard works then disregard that^
So you connected a harddrive from another PC with windows 7 on it. Sometimes that works, sometimes it doesn't! SO back to basics
Pull all the drives out
Does it POST when you push F2 or DEL? and boot?
If yes, get a usb flash drive and on another PC connect to the internet and download the windows media creator for Windows 10 making a windows install
Install one drive for the OS
If successful, install it. It will install without a license but you will know then what the problem is
Now there are some other options if you have a windows 7 media and use a DVD drive
The USB Fat32 issue I was referring to is some people change the format of a flash drive so they can load big videos on them'
Then you transfer a new BIOS to it and try to flash your board and guess what? Your PC with no system or driver can only read FAT32
Format it to fat32, not NTSF or EXFAT
If your are not sure what something means google it
If you want anymore help then list all the parts you are working on by model