So, eh, this is what happens when I try to run a file with Media Player Classic. It also happens when I try to run Rome Total War.

Not too long ago, some messages started to appear occasionally about above dll committing an illegal and shutting down, it happen often after opening a folder, and usually showed up twice-thrice in a row.
Ever since then the above imaged issue occurred.  I don't see the dll shutting down message anymore for some reasons.

I ran a registry scan and cleaned everything and downloaded a new .dll to replace the old one, no improvement.

Help and advice would be much appreciated. 

Sup guys?
I have a mostly new build (everything's new except for DVD and Hard Drives)

I have it for say, two-three weeks now, and it started to freeze up randomly.
At first it happened while I was playing Rome:TW, so I was all "cool, heat problem, oh wait I have shitload of fans and everything seems cool anyways".

Then it started happening everywhere.
I can calmly surf the web and suddenly, BAM! Everything's locked up and reset is the only way out.
It's pretty fucking annoying and the only things I can come up with are heat (but nothing feels hot) or Power Source problem (but I got a new powerful one especially).

pentium dual @ 2000ghz, 2000ghz
1gb RAM
MSI GeForce 9000GT
ASUS P5KC motherboard
A Spire 550 power source

I kinda lost my technowizziness when they started splitting cores like WWII just ended, so tell me if you guys need more info and I'll dig it up.

Thanks in advance, men, you are the shit.