I'm puzzled as to why you can't access the BIOS with the drive installed, as I think you should be able to.
So, just to clarify, the SMART status is now enabled and reporting as 'OK', but the machine still won't start? Just to check, you don't have any external hard drives connected and powered on while you're booting? That can sometimes stall the boot process.
Other than that, I can only guess that perhaps Windows hasn't installed properly, or the hard drive is faulty, or not connected correctly. It would be useful if you could get into the BIOS, to check the boot sequence.