Turn Off Windows Firewall. I had that issue also and that's what fixed the problem. You can turn the firewall back on after. Turn off other firewall you may have also such as Norton and etc.
Or you could just leave it like that. That patch took Meee forever to dl, but it did finish despite the firewall message
issue fix'd Apparently the issue is that the router only lets so much info through at a time, and that's what was triggering the firewall warning. Even with firewall off I got the same issue. btw, I'm able to play SC2 on this old laptop! However, only at lowest settings. Also, I'm currently having a dropping issue, but only because my laptop keeps losing the internet connection. I've had this problem many times, so don't know if SC2 is causing it or not. Unfortunately, due to the crashing issue, im placed in the copper league in 2v2 1 win, 1 lose, 3 d/c's
Hrmmm i seem to be having the same problem as soon as i hit patch "StarCraft II Beta -- Patch 12 (version 0.14.0.15343) " The fire wall seemed to kick in. But my Windows firewall is off and all my ports are open for my router as well as its firewall. Any ideas?