ohhh K … had this problem as well.
I’m in Australia behind a router, but can also direct connect to both Optus and Telstra Internet. Symptoms were no different regardless of ISP, DNS, deleting files, -repair, -clientport 80, etc. Downloads 20Mb and stops. No error.
Tried most of the tactics in this thread with no joy. Got down to 4 files .. no further.
Logged a ticket with ANET and have even sent a wireshark trace of the failure. The trace didn’t look too special to me, traffic just stops. Might be something in there though.
However, just now, I turned off Microsoft Security Essentials real-time protection and got some action from the launcher. It downloaded 2 files and stopped at 20Mb. Rolled the dice again and it got the last two files … and I’m in game.
So … I can’t troubleshoot it any further. But give MSE real-time disabling a shot…