Hi guys

I'm running Xp pro , Norton Firewall, configured for msn . Xp firewall off.
I used version 6.0 and every other previous msn with no problems at all.
Since installing 6.1 and now 6.2 , my pc completely hangs , as if out of memory as soon as a voice connection is made. I can hear the other person fine, but my end, its terrible, all the other person hears is choppy sound.
Please any help is appreciated.
Are there any tweaks I need to be aware of for Xp that may help resolve this problem ?