Help with Titan Quest!!

I recently bought the Titan Quest Gold Edition that includes both, the original Titan Quest and the Immortal Throne expansion pack. Now the problem with this game is that it crashes quite often. I start up the game, play it for some time (anywhere from 30mins to 1 hour) but at some point the game starts to show some weird black objects and odd colors popping up suddenly, which seems like artifacting issues. Pretty soon after these objects and colors start to appear my computer crashes, displaying a blue screen that tells me about some graphics card problems or something (I never get to read the whole thing completely because theres so much jibber jabber that it takes up the whole screen).

The computer restarts itself after that and when I get to my desktop the windows unexpected problem window pops up stating that there was a problem with my nvidia drivers or something that caused my computer to crash. Now I have a 8800GTX with the 169.25 forceware drivers installed on it. I have Crysis and Age of Conan installed on my computer and they work perfectly fine with those drivers. Now, does anyone know what drivers should be used with this game or is the culprit something else?

PC specs:

8800GTX (MSI)

Intel Core2Duo E6700 (2.66Ghz)

4Gb RAM ( 800Mhz)

Windows Vista Home Premium 64-bit

Any help is very much appreciated!

What drivers do you suggest? the latest recommended drivers or beta?turaaggeli

If you get strange colors after playing for a while, that is typically caused by your videocard overheating. You can try updating the drivers first, but I'd definitely check your temps.guynamedbilly

Well, I tried both the latest recommended drivers and the beta drivers but they don't work either. This time I wasn't playing Titan Quest, I was playing Crysis. I was testing the drivers out by playing Crysis to see if they work but nope. Playing with both of the drivers ended in the blue screen error I was talking about earlier. So it would seem that my video card is FUBAR...... I don't know what to do anymore. Anyone have any ideas what could be the problem and how to fix it, or should I take this PC to the local PC store and ask them to fix whatever is wrong with it?turaaggeli

How do I use this memtest thingy?turaaggeli

I'm going to change my drivers back to the 169.25 version and see if they work with Crysis. Now if my testing ends in that darn blue screen error again then there is definitely something wrong with my hardware. I'll most certainly have to take this PC to the local PC store for repairs but before that I'll conduct the memtest thingy.

I'd like to thank everybody for your help on this issue and even though I didn't get this piece of crap fixed your suggestions and advices were very much appreciated. :)