You don't use the wireless LAN? Easy - leave it disabled! I think it may be constantly
polling round looking for something to link onto (like a wireless router) and this
has been the cause of the spikes. I recently added a wireless adapter to my setup
for playing around with, but leave it as disabled when not in use so the "broken"
icon in the system tray does not irritate me. By George I think we have it licked!
Cheers. Spexx.