Windows 7: Trouble installing Windows7 64bit on w/ Asus P8Z68-V LX motherboard

Just recently purchased a Cyberpowerpc Fang Evo Liquidcool desktop that has Windows 7 already. I am having trouble with the actual installation of 7 with the disk that came in the box with my motherboard, because it seems to not be able to locate the drivers needed.

Desktop Specs-
P8Z68-V Lx motherboard
Processor Type: Intel Core i7-2600K 3.4 GHz
8GB DDR3
Hard Drive Capacity: 1TB
Graphics Controller: NVIDIA GeForce GTS 450 1GB

As the new MOBO's has a uEFI BIOS.
How to install Windows 64 bit on a uEFI BIOS:
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with

uEFT BIOS setup:
ASUS Sabertooth P67 Motherboard EFI BIOS - YouTube

Last night i hooked up a HDMI cord to my brand new desktop pc, and it brought up the boot screen, and i had trouble finding and installing windows 7(still havent installed it). After having to remove the HDMI cord(because i was borrowing it) and then put it back in this morning, it wouldnt bring up anything on my screen. Just a little bit ago i purchased a pc RGB cord and that wont work. Is there anything i can do without having to open up the case, because im not very hands on when it comes to this? I have tried to unplug the computer and restart it but it still does nothing.

Desktop Specs-
ASUS P8Z68-V Lx motherboard
Processor Type: Intel Core i7-2600K 3.4 GHz
8GB DDR3
Hard Drive Capacity: 1TB
Graphics: NVIDIA GeForce GTS 450 1GB