Sounds like a problem with you NIC.
Right click on 'Computer' and click on 'Manage'
Click on 'Device Manager' on the left panel and then Expand 'Network Adapters' on the right panel.
Do you have 'Intel(R) Centrino(R) Advanced-N 6235' listed?
If not, let me know.
If it is listed, right click on it and select 'Properties'.
What does the 'device status' say under the General tab? What is the driver version under the Driver tab?
