Infinite BSOD loop after chkdsk

Today I started up my laptop and on the splash screen it says "Scanning and repairing drives" so I'm like why not? After waiting for hours it was stuck at 28%, and I'm really rushed for time to do my work, so I forced shutdown my laptop by holding the power button.

What I didn't know is that now, the laptop has gone into an infinite BSOD loop, where the ASUS splash screen loads for a couple of seconds, then immediately flashes 1 second of the BSOD screen, and restarts, then the whole thing repeats indefinitely. (After restarting a few times, I managed to catch a glimpse of the error, its "NTFS_FILE_SYSTEM")

What's bad is that I don't have a Windows 8 bootable CD, and even with that I realised that I can't find my Windows key anywhere.

I don't want to have to reformat the computer by bringing it to the service centre because my data is all there and I don't have any backups. (Unless during the reformat, my D drive is kept safe)

What do I do?

EDIT: My system specs:

ASUS N64VZ
Windows 8 64-bit
Intel Core i7-3630QM, 2.4GHz
8GB RAM
Nvidia Geforce GT 650M

Try this free hard drive diagnostic: Hard Drive Diagnostic Procedure
If you have difficulties running it, please post back and we'll attempt to walk you through it (booting from a CD/DVD with UEFI can be a bit daunting).

Well the problem now is that I'm already stuck at the first step, since I'm unable to remove my hard drive to check its make and model number. The screw seems to be unique; none of my screwdrivers work, they just slip off.

Use the Seagate Seatools - it'll work on most hard drives that I've seen.
If it doesn't see the hard drive, post back and we'll see if we can work around it.

Burned onto CD and tried putting it into the laptop; what I got is just a longer loading time into the ASUS splash screen, then back to the infinite BSOD loop again.

Sorry, but I'm out of ideas here (other than sending it to the service center)
I'd have to suggest posting for additional help over in the General Forums to see if others can help: General Support - Windows 8 Forums