Any Security software installed? Norton, McAfee or similar?
Please check your browser's Proxy settings, if there's one setup, please remove it. Please follow this guide
If you still can't connect please try thesese suggestions:
Restart your computer, tap F8 and select Safe Mode with Networking, see if you can connect here.
Please provide an ipconfig /all:
Click on Start => in search box type cmd
press enter (run as Admin). From the black screen, type the word ipconfig /all
and press enter. Right click on the black screen or Command prompt then choose Select All and Paste the results here
An update will be appreciated.