8INXP Lan Problems

I'm using XP Pro, and it has no access to the web. I dual boot to a music
side that has no installed modem, all extra ports are disables etc. The Lan
works fine on the other "Office" side, and in fact it works fine on the
music side for tranfering files etc. But if I use any music application that
pushed the CPU above 40% the audio glitches with a regular tick every
couple of second. As soon as I disable LAN in hardware it's fine. The only
"Network stuff installed is the Drivers for the LAN and I ran Network setup
wizard to link to the other computer.

I've left cubase, my music program, running, gone into Hardware disabled LAN
"on the fly" ,so to speak, and everything returns to normal, no Glitches.
What I have noticed though is if I have Windows Task manager running and
watch it's CPU usuage readout, when the glitches appear the CPU actually
drops to 0 and the jumps back up, so I dont know if its CPU spikes or
dropouts. Also it dosent have to be Cubase, it does it on stand alone
synths. If I play random notes to get the CPU up to 40-50% your can hear a
click every few seconds, but it is a regular pattern?????..... I've also
tried disabling one service at a time going throught the majority of them,
but no change.


PC Specs
Gigabyte 8INXP (with GIGA LAN built in)
2GB Ram
P4 3.06Ghz
3 Western Digital HDs
Win XP PRO


Cheers