Windows 7: PC doesn't recognize my hard drive, Windows 7 Ult x64

In an attempt to make more space for my media files, I created a new partition on my computer and simply moved all of the files from my previous 40Gig partition into my new 100Gig partition.
Everything was done using the built-in software that came with Windows 7 Ultimate.

Things went fine for a while, then I wasn't able to load my PC.
Fair enough, I reinstalled the OS.
It worked for a few hours, I installed all the updates into my system after the fresh install.
But when I turned it on in the morning, it worked for about 30 minutes and then I got a blue screen and it auto-restarted.

Now, I can't access Windows or even reinstall it.
The Windows installation disc doesn't recognize my hard drive anymore.
(It's an official disk that I got from my Dad whom works at a Microsoft partner company.)

Boot from your Win 7 DVD into a command prompt.

Can you see the disk and drives there?

■Boot up from your Windows 7 DVD.
■At the first dialog window, press SHIFT + F10 key combo
■You will have a X:> command prompt
X: is a ram drive created by Windows 7.