PC keeps crashing randomly

I have Windows 7 64-bit with all the latest updates. I have a Gigabyte Z77-D3H motherboard, 8GB of DDR3 RAM, intel i5 2500k CPU, EVGA Geforce GTX 570 videocard

My video drivers are up to date, all drivers are up to date. I get a blue screen randomly and the computer reboots. Here's the log from Windows:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.
Locale ID: 1033

Additional information about the problem:
BCCode: 50
BCP2: 0000000000000000
BCP4: 0000000000000007
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

Anyone have any idea? I ran memtest86 and no problems.

THis is from WhoCrashed. Does anyone know what this means? Or can point out a section of this forum or another forum that has people who know? I'm getting desperate.

On Thu 11/1/2012 5:20:25 PM GMT your computer crashed
crash dump file: C:\Windows\Minidump\110112-24024-01.dmp
This was probably caused by the following module: ntoskrnl.exe (nt+0x7EFC0)
Bugcheck code: 0xA (0xFFFFFA8025D25010, 0x2, 0x1, 0xFFFFF8000F73C376)
file path: C:\Windows\system32\ntoskrnl.exe
product: Microsoft® Windows® Operating System
company: Microsoft Corporation
description: NT Kernel & System
Bug check description: This indicates that Microsoft Windows or a kernel-mode driver accessed paged memory at DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
The crash took place in the Windows kernel. Possibly this problem is caused by another driver that cannot be identified at this time.

If nobody knows, does anyone at least know of a forum that I can ask this question to that has someone who does know? These crashes are very annoying. I've tried reinstalling all the drivers and still keep crashing.

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