Regular BSOD in XP SP3, doesn't appear to be malware, dump analysis attached

My 3 year old machine specs are the following:

ASUS A8N32SLI Deluxe mobo
AMD FX55 processor
2GB OCZ RAM (can't remember the exact model)
BFG nVidia 8800 GT video card
Sharp Aquos 46" TV (DVI out)
2 74 WD Raptor 10k HDD in RAID 0 (C: drive)
1 500GB Hitachi HDD (D: drive)
Sony DVD+-RW (can't remember exact model)
Onboard RealTek AC97 audio, S/PDIF out to receiver
Sondigo Inferno CMI-8788 sound card, S/PDIF out to receiver
M-Audio JamLab sound card (USB)
Netgear WAG311 PCI WiFi card
Saitek Eclipse keyboard (USB)
Logitech MX-510 mouse (USB)
Nostromo n52 gamepad (USB)

I've included Belarc Advisor output in the attached ZIP for full details, named (Htpc).html (licenses removed).

This is my hobby/HTPC machine so in terms of software I have everything from Photoshop to Pro Tools to MATLAB and everything in between installed (see attached Belarc Advisor output for details). It's run extremely well for over 3 years, virtually 24/7, with a BSOD or other lockup occurring only every 6 weeks or so.

About a month ago I upgraded to XP SP3, installed a new antivirus (Kaspersky Internet Security 2009) and upgraded various drivers to the latest versions including my motherboard, sound card and a few others recommended by Microsoft Update. Since then I've been experiencing random BSODs that seem to be getting more frequent, in the past 2 days I've had 6 for example. There doesn't seem to be a clear trigger, in that one time it crashed in the middle of a movie, another time upon loading iTunes, another time it crashed overnight with uTorrent running. I don't have System Restore or any rollback options available, so diagnosing and fixing the problem is the only option available to me.

I've gotten minidumps from the past 6 dumps, the text output from !analyze -v is included in the attached ZIP. Here's a summary:

Dump 1: KERNEL_MODE_EXCEPTION_NOT_HANDLED_M (1000008e)
Process Name: wmiprvse.exe
Image Name: aksfridge.sys

Dump 2: PAGE_FAULT_IN_NONPAGED_AREA (50)
Process Name: System
Image Name: SiWinAcc.sys

Dump 3: DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)
Process Name: zplayer.exe
Image Name: wag311n5.sys

Dump 4: BAD_POOL_HEADER (19)
Process Name: System
Image Name: ntkrnlpa.exe

Dump 5: PFN_LIST_CORRUPT (4e)
Process Name: firefox.exe
Image Name: nv4_disp.dll

Dump 6: NTFS_FILE_SYSTEM (24)
Process Name: ekrn.exe
Image Name: Ntfs.sys

Dump 7: NTFS_FILE_SYSTEM (24)
Process Name: ekrn.exe
Image Name: Ntfs.sys

I have all available Microsoft Updates installed as of November 24 2008.

I ran full scans with Kaspersky Internet Security 2009 and NOD32 with latest definitions and found nothing. I've attached a HijackThis log in the ZIP just in case.

I thought it might be bad RAM so I ran memtest86 overnight for 10 passes but got no errors.

I saw a few of the errors might be IRQ related so I checked my IRQ settings in Device Manager and noticed a couple of IRQs are shared between relatively high-performance devices, this may be a red herring but I thought it was unusual. Screenshot below:



Any advice would be helpful as I don't seem to be making any progress on my own. Thanks in advance!