Game Crashes Comp

I'm on Factions, and usually about 15-20 mins into play the computer shuts down, and it only happens when i play factions. I Dont know my system specs, so dont ask, and i probably wont know what your talkign about, so please try to explain this in the most "lamens terms" you can.

I dotn get a blue screen or anything. The mouse, keyboard and monitor shut down, but the little green light on the computer is still there.
Im guessing ti shuts down the speakers as well, thats why i dotn have any sound, but is the game still running?

How can i fix this, because its really RED ENGINE GORED ENGINE GORED ENGINE GORED ENGINE GOking getting on my nerves.

Your computer is overheating. You can bet on it. The solution is to improve ventilation in the case.

If so then why does it onyl hppen during guildwars?
We've had fans on, the top fan open, and it still happens.
are there any ways to iprove it furthermore?

Give you PC's inside a quick blast with a can of compressed air, making sure to focus on all your fans including the CPU and graphics card's fans. Then use a vacuum cleaner with a pipe (I have a 12V car vacuum cleaner specificly for my PC) and carefully hover it over the internals making sure not to touch anything whilst carefully brushing with a fine sablehair paintbrush.

Also, when playing don't open the case. If you've got multiple case fans running then taking the side off totally negates them. On my system, due to the finely balanced nature of the blow/suck fans, taking the case off actually increases temps.

Well, I replied this in another thread:
"resets is usually a sign of overheating problem. Overheating is very common with GW, as it is very taxing on the CPU/memory subsystems, and marginal systems will overheat. You can check if the crashes go away if you open the computer and run with the cover off (running without cover is not dangerous for your computer unless you spill coffee into it or something).
Another way to test for overheating issues is to get another program which stresses the CPU and memory systems and see if it too causes crashes (e.g. try running a looping CPU test in 3DMark2001 from http://www.madonion.com, or Prime2004 torture test from http://sp2004.fre3.com/ - both these programs should provoke your computer to crash within a few hours if it's got insufficient ventilation."

I'd suggest you get one of the torture tests, and run it. If it crashes your computer like GW does then you know you've got heat issues and not, say, too weak power supply, faulty RAM, or a buggy device driver.

I had the same problem with Guild Wars it would just crash, but I submitted a problem thing to microsoft and it said it was a problem with the built in intel graphics driver so I upgraded and everything seems to be working Also at first I thought it was overheating but it wasn't.