XPS 400 and WoW problems

I'm having trouble with World of Warcraft running on my XPS 400 that I received back in September. I frequently receive these error when I am playing. The frequency of these crashes can be anywhere from 15 minutes of play to 6 hours of play. It's completely random:

 

This application has encountered a critical error:

ERROR #132 (0x85100084) Fatal Exception
Program: C:\Program Files\World of Warcraft\WoW.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 001B:4FE1E8D9

The instruction at "0x4FE1E8D9" referenced memory at "0x3F800000".
The memory could not be "read".

 

This application has encountered a critical error:

ERROR #132 (0x85100084) Fatal Exception
Program: C:\Program Files\World of Warcraft\WoW.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 001B:0060E2C9

The instruction at "0x0060E2C9" referenced memory at "0x00253000".
The memory could not be "written".

 

Blizzard's tech support seems to feel it's some kind of hardware or drivers issue. I've ran the Microsoft RAM tester and my chips were fine even on extended scan. I updated my SB X-Fi drivers from the Creative website. I downloaded the GeForce 7300 LE 82.68 drivers from the Dell support website and still have the problem, and downloaded the 93.71 drivers from the NVIDIA website and still have the problem(and the 93.71 drivers also give me a blue screen in the game and locking up my whole system, saying something about my nv4_disp driver is producing an infinite loop and it says STOP: 0x000000EA).

 

So basically I want to know if anyone else had success running World of Warcraft flawlessly on their XP 400 and what they had to do to get there! The game has done this since the day I started playing it so it's not like some piece of hardware has "gone bad" in my opinion, it's probably driver or software related somehow. Do I need to download all my drivers from the Dell support website or is it fine just getting them from the company that made the product? My biggest problem with the Dell drivers is that there is no "autodetect" and I have to select from a list what hardware I have even after entering my service tag. I didn't install it so I don't know! For instance, after you enter the service code it asks you for your operating system. Well I have Windows XP Media Center Edition and it lists Windows Xp and Windows XP x64 on there so I have no idea which one it is(I've just been picking XP). Then I get to the Audio Drivers and it lists " Creative Labs Sound Blaster X-Fi XtremeMusic (D)" ... well I know I have a SB X-Fi but I have no idea if it's that. Then you go down to the nVIDIA GeForce 7300 LE video drivers and the ones they have listed there are 82.68 but as mentioned above the most current ones from NVIDIA are 93.71. Are these not posted due to compatibility issues with DELL PCs or has it just been overlooked on accident? Oh but there's more fun! I also see a " Intel Chipset Software Installation Utility" that says URGENT but I have no idea again if it applies to me. It's Chip Set: Intel Chipset Software Installation Utility v.7.2.2.1006 but how do I know if I already have this? the date listed is 1/20/2006 and I recieved my PC in September.

 

LASTLY, and this may even be my the solution to my problem, the BIOS. There's a flashbios update listed for BIOS: Dell Dimension System BIOS, English, Dimension DXP051, A07 that was released on 1/16/2007 but I'm afraid to screw up my computer doing this. Is there need for concern? Also, Blizzard Tech Support saw this IRQ configuration and thought there might be some conflicts causing problems due to IRQ sharing of the sound card and video card. However I see no conflicts in the device manager and this was shipped to me from Dell with these all sharing IRQ 16:

 

IRQ 16 Intel(R) 945G/GZ/P/PL PCI Express Root Port - 2771 
IRQ 16 NVIDIA GeForce 7300 LE 
IRQ 16 Intel(R) 82801G (ICH7 Family) PCI Express Root Port - 27D0 
IRQ 16 Intel(R) 82801GR/GH/GHM (ICH7 Family) PCI Express Root Port - 27E0 
IRQ 16 Creative SB X-Fi