New pc.Bassicly the 1tb baracuda seagate doesn't want os installed in it tried usb,disc doesn't so i thought i would get my other hdd pluged in with os already installed worked like a charm.few hours passed and after shutting down and turning my pc on pc doesnt recognise my hard drives new/old so wtf now it just hangs up on a2 and doesnt even post to bios ?