Vista - World of Warcraft Lag Spikes please help!

I'm sure this has been reported by several individuals before me, but ever since I have been playing World of Warcraft wirelessly on my new notebook with Vista I have been hiting these lag spikes every couple minutes, that can range anywhere from a second to 15. During this time cpu and disk spike to 100% usuage. My specs are as follows

# Operating system:Windows 2.6.0.6001 (SP 1)
# CPU type:Intel(R) Core(TM)2 Duo CPU T5550 @ 1.83GHz
# CPU Speed (GHz):1.853
# System memory (GB):2.998
# Graphics card model:NVIDIA GeForce 8400M GS
# Graphics card driver:nvd3dum.dll
# Desktop resolution:1280x800
# Hard disk size (GB):286.261
# Hard disk free space (GB):159.56

I have tried updating my drivers for my NIC and my graphic card, as well as disabling a roam feature on the vista wireless network, but these have not halted the dreaded spikes. Also, I have tried playing while directly connected to the internet but even then the spikes occur. Does anyone know what is causing these spikes and what can be done to solve them?

What is your wireless speed ? I don't mean the speed between your computer and the modem.

My landlord gets 45 Megabits between computer and modem; however, his connect speed from the modem to the internet is 1.5 megabits.

I run my cable modem, wired, at 3 megabits. No lag.

My connection is also at 3 MB.

what is your pc directx version ? because i think that warcraft will only work properly in directx 9.c

osama

This seem's to have been an on going problem for the last few year's, opinion is divided as to the cause, some think it's server related, other's think it's the individual's pc, i dont think there is a definitive solution to this problem, what work's for some won't work for other's.