Last suggestion:
• Go to Start > Connect to.
When the Connect to a network dialog window is displayed, click Open Network and Sharing Center.
When that window opens, click on Manage network connections.
You may see multiple adapters available in this window.
Right-click the adapter named Wireless Network Connection (or something similar) and click Properties.
Wireless Network Connection Properties will display.
Highlight Internet Protocol Version 4 (TCP/IPv4) and click Properties.
Internet Protocol Version 4 (TCP/IPv4) Properties will appear.
Under the General tab, make sure that both
Obtain an IP address automatically and
Obtain DNS server address automatically are selected.
Reconnect to the wireless network.