Motherboard has been updating for 2 days

Hello this is crazykilla

Im having a problem with my pc, i tried installing windows 8 and when installer reached 100% the computer reatarted, as soon as my pc started up (also taking a unussualy large ammount of time to start) it says:

PNY GeForce GTS 450 PCIe 2.0
Version Blah Blah Blah Blah
Copyright (C) 1996-2010 NVIDIA Corp.

After that, screen goes balck and about 10 seconds later i get:

Asmedia 106x SATA Controller Ver 0.93.1 AHCI Mode
Copyright (C) Asmedia Technologies, Inc. All rights resereved.
S.M.A.R.T. Supported
Using PCIe Gen 2
SATA PM 0 Port 0 WDC (then some random codes)
Press any key to exit...
(no matter if i press any key the below happens)

Then screen goes black, around 20 secs later i get this F***ING MESSAGE:

iROG-1 Is updating
Please do not reset the system to prevent damage to system bootup
0% complete

IT LITERRY TAKES 20 Hours to get to 100%, after that It starts ALL OVER AGAIN,

That explains what happens, my question is how do i start windows and stuff without having my motherboard (rampage iv extreme) not update or atleast make it finish the update

Note: In this whole process pressing f8 and Del doesnt open BIOS or the option to choose safe mode and stuff.