Blue Screen with GW.exe

I get a Blue screen that says Dumping memory cache randomly while only playing guild wars. It can be right after I login or 30 minutes into PVP.

This is my computer at work (Shhh don't tell my bosses), I just got it upgraded to a 3.0ghz, 512mb ram, ASUS MB and I need dual monitars for programming, so I got a nvidia 7300gs PCIe.

Guildwars works fine with the onboard VGA, So I assumed that the issue was with the video card.

What I tried:
I used the latest nVidia driver and a previous driver
DownLoaded the latest Directx
All Microsoft Updates SP2
Disabled the Sound(just something to try)
New computer, so this is a brand new download of GW and OS
I have dual view, so I tried it with single
Checked Bios, it looked fine.
bought a 400w PSU it was a 300w
All this and still BLUE SCREEN O DEATH

It seems to Blue screen faster if I have a few other windows open.

any suggestions?

I get this as well at my home computer and have tried everything to stop it. However, it continues to happen about once every 2 nights.

I used to get this before I changed my computer's case. It's a blue screen with a ton of white writing right? I think this was caused by over-heating because my computer was tucked under my desk up against a wall and the fans just blew the heat against the walls. I moved my computer out and it cooled down more but from time to time it still went to the blue screen.

I sent ANet an email using the Support from www.guildwars.com and they told me to do a bunch of things which didn't help so I quit replying.

I'm using my brother's computer case which has a few more fans than my older case and it has never went back to that blue screen so yeah I'm pretty sure it could be over-heating problems.

at least you didnt get the BSoD every 30 seconds after you started up the computer. The only way we got the computer fixed, was that we gave it a formating.