Make sure that you have the latest driver for your Wi-Fi Adapter. This is a wireless issue correct? Pls. correct me if I'm wrong. Have you tried a wired connection?
Please provide an ipconfig /all output.
Click on Start => in run or search box type cmd, choose run as Admin and press enter. Open up a command prompt then Copy and Paste these ipconfig /all >c:\ipconfig.txt . Please attach the .txt file to be found in your Local Disk 'C' on your next post.