NIC checksum offload enable/disable

To enable/disable NIC checksum offload:

[Windows]
   . Go to Control panel -> Network and Internet -> Network and Sharing Center
   . Click "Change adapter settings"
   . Right click on the NIC and select "Properties"
   . Click "Configure" -> Advanced tab
   . You will find
        . UDP Checksum Offload (IPv4)
        . TCP Checksum Offload (IPv4)
        . IPv4 Checksum Offload
   . Enable/disable could be done there.