You need to check the following is set up correct
Windows 7 contains both the familiar IPv4 stack and the new IPv6 stack; you do not need IPv6
at present disabling IPv6 in Windows 7 will help to speed up the connection on your broadband
service
In the “Local & Wireless Network Connection” you need to un-tick the following items
“Internet Protocol Version 6 (TCP/IPv6)”
“Link-Layer Topology Discovery Mapper I/O
Driver”
“Link-Layer Topology Discovery Responder”
Click OK after un-ticking the above for the changes to apply
At the top of display the type of Lan or Wireless card will be displayed
Click Configure – Click Advanced Tab
Click Connection Type - Change to “Auto- Negotiation”
Click Power Management Tab
Un-Tick if selected "Allow Computer to turn this device off to save power”
Other setting to check
Right click on the wireless Icon in the task bar – Click “Open the Network and Sharing Center”
Click “Change Adapter Setting” left side of page
Right click on “Wireless Network Connection” – Click Status – Click “Wireless Properties
Button”
Tick “Connect Automatically when this network is in range
Tick “ Connect even if the network is not broadcasting it name (SSID)