XPS 8300 BIOS boot up sequence

Dear all,

I played around with my bios to fix a small problem, but now I cannot start my Dell XPS 8300 PC. I removed some items from the boot start sequence in BIOS. I reloaded the old saved BIOS but that did not help.

i use Bitlocker on Win 7.0 and got my key installed on a USB stick attached to the PC and got standard Dell RAID 0.

Could someone please let me know what BIOS start up sequence I need to make my PC work again.

Thank you very much.