PC keeps freezing

so, i build a new computer, because the old one kept freezing!
Now this one does it too!
All of the sudden, it freezes and makes the speakers buzz like hell! It was exactly the same thing, my old pc did!
The oldest parts is from Feb, this year.
Asus P8Z77-V LK
Msi 670 ref
3770k @ stock
16 GB of Kingston HyperX Beast 2400 MHz @1600 or 1333
2x1TB WD Green

Keep in mind, that the HDD's is about 6 years old, and is the only things that was in my old build.
This have happened almost only, when playing LoL AND talking on skype.. Mostly around 2 am... But it have happened once, outside of a game, when it was idelling..

Please help me! :(

PSU: Corsair TX 650, one month old. 
I can't test with any other harddrives, as i don't have any, but planing to get an 840 EVO around christmas 

The hard drive sounds like the culprit here. It seems like it's the only common part between your old PC and the new one, which would explain why the issue migrated. You might just have to deal with it until you can get a new one or can find another one to test with.

It must be the gods telling you you shouldn't play so late. Don't worry you can file a support ticket nowadays. Just pay the tribute.

Its your HHD then if that's the only component you used in your old build which also had freezing problems, you already worked this one out yourself.

It's your HDD, backup your files and format or get a new one.

eat your HD, become one with the data

I tried that once, it didn't work...  Got my dick stuck in the exhaust pipe of my neighbor's truck.  I need some better instructions than the ones I followed on Wikipedia...