Are you using any kind of VPN or remote desktop? NDISWAN.sys controls these things. Try turning off remote desktop by right clicking my computer, properties, remote tab, and uncheck remote desktop. Also update the drivers for your Network card and check device manager for IRQ conflicts.
I've seen several very similar BSOD's here at work caused by IRQ conflicts with the NIC cards..
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System: Athlon 64 X2 3800+
EVGA Geforce 8600 GTS 256mb PCIE
ECS (pile of crap) Mobo
1.5 GB Corsair PC3200
Soundblaster Audigy Pro
Windows XP Pro, Lemming Optimized.