Ok, for anyone this worked for...

Please identify the network card you have. And what software firewall you are using.

Most people will likely have either a Realtek, Broadcom or Intel chip
Like, I have a "Intel(R) Ethernet Connection I217-V" which is more or less a high-end part and I have not had to change any device settings.
I am using Avast Antivirus, but I'm not using the entire security suite which would have a firewall, I'm just using the stock windows 7 firewall.

Most onboard non-wireless network chips are Realtek RTL8111/RTL8168 series

Symantec has instructions on how to disable TOE
http://www.symantec.com/business/sup...&id=TECH197934

So do a few other Antivirus vendors. This actually suggests to me that it may be peoples third-party firewall software.