I have exactly the same problem, win7 64bit, onboard atheros L1 gigabit controller on Asus P5K. Turning off ‘task offload’ resolves the dead problem but transfers are a lot slower, I’m getting no more than 3300KB/sec on a gigabit link… very sad, I’m getting higher speeds on wireless-n… Atheros driver: 13/10/2009 –

EDIT: I just found this solution: turn flow control OFF and task offload back ON! Speed is back to normal and no dead connections while transfering large files.

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