BSOD when playing random games, error 0x00000124

Hi there,

3-4 months ago i changed the RAM in my PC from 4gb to 8gb, and i've been experiencing BSOD and computer freeze efter since when playing some different games.
Typically it happens when i play Steam games like Dota 2, CSS or other games launched from Steam. It crashes differ from time to time. Sometimes i can play without having any crashes for 30minutes to an hour, and other times it happens 5 minutes after i've entered the game. I must point out that this doesnt only happen when i play steam games, it also happens when playing other games.
Also i've been experiencing that my computer freezes without going into BSOD whenever i happen to download a patch / update from a launcher - example WoW updater. Whenever i try to update the game through that updater, my computer freezes immediately.



Please help me out.

Okay i've just updated to Service Pack One.

And i've followed the guide to configure the DMP files.
Do i have to upload any new files now? or what would you like me to do ?

Okay, i've had a crash last night and it created a DMP file.

How do i upload the DMP file for you to see it? It says when i'm trying to upload the file, that it's unknown.