BlueScreen STOP: 0x0000007F on newbuilt system ... HELP!

I have the following setup:
CPU: Intel 2500k @ stock frq.
GPU: Gigabyte 560 GTX Ti OC @ stock frq.
HDD: WD Caviar Black 1TB
SSD: m4 Crucial 64GB
Motherboard: ASUS P8Z68-V
Memory: 4x2GB of Vengeance (Corsair) @ 1600MHz
OS: Windows 7 64bit Ultimate

It's a new computer.
The problem is that I get a BSOD every now and then (about 5-6h after computer startup mostly), not very often but it happens and it's always the same BSOD.

My temps are cool. CPU @ 36*C at idle and 56*C when all cores are working 100%.

This is my BSOD (taken from the Windows error report):

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1053

Additional information about the problem:
BCCode: 7f
BCP1: 0000000000000008
BCP2: 0000000080050031
BCP3: 00000000000406F8
BCP4: FFFFF8000328CEAC
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Also I have memchecked with memcheck86 and it found no errors. :[
Gaming runs perfectly and everything else... it's just this bloody BSOD!!

I have Corsair TX v2 750w m (modular and bronze-cert).

I tried running prime95 many times with different setups it worked perfectly.. no problem.

I have the latest graphicsdrivers (beta from nVidia), I tried 2 different motherboard drivers (latest from ASUS and the one on my CD).

Don't know what NIC is though!

Any ideas?

OK I will try that!

I run the following programs in the background (all latest version):
AVG Anti Virus
ZoneAlaram Firewall
Steam
... and drivers for headset, haddrives and network.

The NIC is the one on the motherboard!

Any more ideas? I'll try the older GFX-drivers!

Thanks so much for the answer! I googled ZoneAlarm and my BSOD and people seem to have similiar problems!
I'm gonna try disabling zoneAlarm and see what happens!

I'll write back when I'm certain BSOD has stopped or if they come again. :]