Oh yeah, so furthermore, this is not so much about your paricular OS or the install of MIRC, etc, etc. Obviously those things are important and you do need to have a 'clean machine', yet if you'd really want to 'solve' the problem, a guess is to enlarge the winsock que (of which I don't know how to do, or if you even can), yet even that would have no effect on not getting a return ACK.

(ie- In the end this is NOT a software issue as more of it is a NETWORK COMMUNICATION issue. try changing your connecting server to get a 'new' path across the internet to whatever network you connect to.)

Good Luck. I still get the problem as well, and just as frustrating too. (Hey, all my hair did indeed grow back!)