Having problems starting Windows 7 Pro 64 bit (nothing working)

So the past few days I've been fighting a heroic battle to save my computer. So far no luck....
I'd like to start by saying that my OS is a Windows 7 Professional 64-bit. It's a fairly new gaming PC that my dad and I built together. Overall it never had any serious issues, and all the parts functioned properly. Then one day it refused to boot. I would turn it on and it would freeze at the loading windows screen(with that animated logo thing).
Naturally I tried using the backup DVD to repair any issues. Windows loaded properly this time and opened to the DVD menu where it asked if i wanted to install Win7 or repair it. I selected repair and then selected startup repair and it began "attempting to fix problems". This took 24+ hours and after that there were no results.

I believe the problem is that windows somehow doesn't recognize that the C hdd exists. In startup repair it automatically uses D:\ and when i try to load C:\ it just says that the hdd is empty. Seems like C almost vanished......

I also tried using command prompt to try an repair the boot.ini using the following commands:
Bootrec.exe/FixMbr
Bootrec.exe/Fixboot
this didn't work, but that was no surprise because at the top of the Cmd Prompt window it said X:\ Source or something like that, which meant i wasn't even using C:\
I tried typing C to change it but it said that it wasn't "recognized as a internal or external command". Apparently the only way to fix this is by opening my computer and checking the exe file, but obviously I can't.

So yeah, I don't know what to do really. I've tried everything I know. Nothing seems to work, and when one problem seems to be fixable, another blocks it from being fixed. Please help?

Reboot to enter BIOS setup to see if the HD is detected and registers correctly. If not change out the cables to see if it can be detected in BIOS setup. Try another port on the mobo.

Boot the HD maker's HD Diagnostic extended CD scan to see if it detects and can repair HD.

If HD still isn't detected you can try it in another PC but most likely it will need to be replaced.

If HD is seen, work through these steps for Troubleshooting Windows 7 Failure to Boot

allright thanks a bunch man, Im gonna go see if that does the trick! I'll let you know if it works.

I checked the BIOS menu screen, and found that both hdd(i have dual hdd) were listed. however when i was in the main screen of the BIOS menu, there were no SATA items found. Usually it should have a list of SATAs under the System Time/System Date/Language box.
So I think the problem may have something to do with this. Just letting you know, my motherboard is a ASUS Rampage III Extreme.