This same thing is happening to me right now. Sometimes a bot will start sending a file, and a few seconds in, the whole computer freezes for about 10 seconds, then stops, then freezes, then stops. Even closing everything - shutting down all processes - the freezing cycle continues.
I'm running mIRC 6.14 through a netgear RP614 router on cable. I just reinstalled Win XP Pro. Anyone come across any ideas for this problem?
