Win 7 Random freeze & Shut down (HDD Light, lights up solid blue)

Hey,

So I walked away with my computer and returned and oddly it was off. I had my iphone plugged in and Chrome was running.

I then turned my PC on again and then it Randomly froze went to a black screen and shut down. The HDD Activity light turned a solid blue (no flicking just constantly light up). I have no idea whats happening and It's scaring me since this is my first ever Custom build.

The HDD's i have install are:

Primary for OS etc: 128GB Sandisk SSD
Secondary for files: Seagate Baracudda 1TB

Other hardware is:
Corsair CX600M - PSU
i7 4770 - CPU
Gigabyte GA H87M DRH - Motherboard
MSI R7770 - GPU
16GB G-Skill Ripjaws - RAM

It's only just happened as of now. The computer otherwise runs perfectly fine and I built it about 2 weeks ago. This has occured maybe 3 times as of total.

All help is appreciated

Thanks

Golden said:

Please check in C:\Windows\Minidump for files with a .dmp extension. Do any exist?

No new ones were created :/ I set windows to not overwrite the old ones. The last one was on 30/12/12 which I already found the cause of thanks to the forums.

So this happened again but this time the computer froze and the HDD LED light was solid again.