Already done the anti-virii step, no effect.

Clients on 2 servers, multi channels each, bot's on 2 of the same, same channels I'm already in. I haven't got a clue what the trigger is, sometimes it's that large from the word go, sometimes it takes a few minutes to kick in, sometimes hours. I am beginning to suspect mircstats may be part of the problem, since that's begun to hang but I'm not sure if that's a cause or an effect of this, I haven't changed a setting on any of this and it just started happening.