Shimmering Daydreams

Motherboard: Gigabyte Z170-HD3P BIOS: American Megatrends (version F22g) OS: Windows 10 Pro x64 (yeah, yeah, it's only temporary, calm down) The issue: After setting things up for a system encryption I am prompted to complete the pretest. However, after restarting, the Gigabyte and Ultra Durable logos come up, with the BIOS key configuration info on the bottom, and then the system just dies. it boots down, and then reboots again, only to shut down again. And this would continue if I wouldn't interrupt...