Game freezing 0-4 hours of gameplay.

I have been experiencing random freezing when playing the game. I get it normally 60% of every gaming session. The time it freezes can vary from a couple of minutes to 3 hours from what I have experienced. The freeze repeats the last sound playing in a stuttering noise, then the sound stops and the only way to escape is to reset the computer. Not only hinders my gameplay but others as well since I am mostly in a mission and all of a sudden I go "AFK"

I would believe that my pc is up to specifications for to run GuildWars, my only doubts on why this crashing occurs are that perhaps I am running a 64bit Processor on a 32 bit OS (XP pro) and my other would be that my graphic card is rather unheard and I would immagine it not to be that supported that much even by nvidia drivers. But please draw your own conclusion to why this problem occurs, its good to have many leads.

I have tried and ran the lowest graphics and gently ease it up hours by hours it still did not work.

Some people around say here it is overheating - I very much doubt that with my tower case but if anyone can tell me how to check tempeture/fan speed via rivatuner Ill be happy to.

My specs: XP Pro, AliveSata-GLAN2 Mobo, Athlon 64bit Dual Core 3800+, 2048mbs RAM, GeForce 6200 128mb

64bit and 32bit windows does not matter.
well you can kind of isolate the problem by running sp2004, memtest, super_pi, and a video benchmark like 3dmark. (google them)
for sp2004 set the test to cpu run it for like 30min to hour
then test the ram
run memtest to test the ram
run 3dmark to test the videocard. most likely if the other test pass its your video card or your motherboard.

Try turning back your sound hardware acceleration in properties. Do this just for troubleshooting and see if it isolates the problem. While most freezes are assumed to be graphics related, often other things can attribute to the problem.

I will be bumping this thread on XMAS, when I get my new videocard and tell you the results.

Here's another idea, and it's free! There is a program called Free Ram XP pro and it helps to free up ram (duh..hehe). I was having the same problems and this works great. I think even with the new vid card, you probably will still have this problem. My computer was pretty much made for gaming and this still comes in handy every once in a while.