Not sure if its a AHCI/SATA detect delay ( I am able to bypass it by pressing the ESC button). This might only be on my bios version (original version), It might have been removed on later bios versions.
To lazy to update the bios
I don't even know if it's a BIOS or OS issue. It is a countdown to Windows, no? So that could mean it's an OS thing. Why would the BIOS mean countdown to windows? what if you had linux?