socklosk :
I have a Gigabyte H97 chipset motherboard that has already been RMAed. It came back good, or so they claimed. The CPU is an, i7 3.6 GHz Haswell. The battery is brand new. Also, I replaced everything in the computer, piece by piece, even the motherboard, and I used all the spare parts to build a good backup computer that looks to have the same issues, but I hardly use it, so I do not know for sure. My OS is on an SSD, and is showing that it's good.
Again, it all started when I went with Windows 10!
Wait, are you saying that you have a second PC which has the exact same problem?
Normally a BIOS doesn't easily get corrupted. There are mechanisms that protect it. That's why an OS cannot corrupt the BIOS, unless you have some kind of virus that tries to constantly flash the BIOS chip, which is extremely rare. Also when you have a corrupted BIOS there are also other signs which I don't think you have.
On the other hand you cannot have a bad BIOS chip because this is supposed to be a new board. Did your previous board had exactly the same behaviour? Have you flashed the BIOS chip with the latest Gigabyte version. Also does your board have a dual BIOS system. Some Gigabyte board have it. If it does try to select the second BIOS chip to see if that changes anything.
The only thing that I can think right now is that something is happening with your SSD. What's your model? Have you upgraded the firmware to the latest version? A bad SSD could cause that behaviour. You said that you have changed all the parts. Did you also change the SSD?
Finally you said that there were about 300 repeated boot options in your BIOS. What do you mean by that. Do you recall what the other options were and if it was a specific drive that gets repeated as a boot option?
Windows 10 shouldn't cause that behaviour unless there is something going on with the secure boot but normally your OS/BIOS should warn you about this and not just say that the OS could not be located. Check you BIOS and make sure that secure boot is enabled.