PC Crashes

Hey guys Im having a slight problem with my computer at the moment.
Its just over a year old and so far has randomly crashed 4 times for no apparant reason. Once was playing even about 40min ago and then again just now when I was playing Alien Swarm.
The details I get when I start back up are as follows
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 2057

Additional information about the problem:
BCCode: 1000007f
BCP1: 00000008
BCP2: 80161000
BCP3: 00000000
BCP4: 00000000
OS Version: 6_0_6002
Service Pack: 2_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\Mini072410-02.dmp
C:\Users\Owner\AppData\Local\Temp\WER-151679-0.sysdata.xml
C:\Users\Owner\AppData\Local\Temp\WER695C.tmp.vers ion.txt

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Any and ALL help to quickly fix this are much appreciated!

Take out all sticks of RAM apart from 1. Depending on your Motherboard, you have to leave the 1 stick in with the first lane.

When it next happens can you post the stop error message, I.E: Memory_Management, System_Service_Exception etc..

if all the crashes happened during alien swarm its the game alot of people getting system lock ups or crashes