Unless you can be more specific about exactly which settings you have changed its hard to help.
Load default BIOS settings then just change SATA mode to AHCI, Windows 8.1/ 10 WHQL Support to Enabled and Boot Mode Select to UEFI. Then save, exit and reboot. If that doesnt work I dont know what is wrong. If you change even one other setting pay attention to what and say. If you just play around with settings randomly its like chasing shadows for us.
And double check it is clipped in fully. Dont worry about shocks. Its fine.