open command propt as admin,
type ipconfig /flushdns
type Ipconfig /release
type ipconfig /renew
If this dosent work, proceed below.
Open internet options, go to connectivity, then click lan settings and make sure nothing buy the first box is checked.(auto detect settings)
then go to network and sharing center, manage network adapters, find your adapter and right click, then properties, doubl click the Ipv4 settings in the middle box, now make sure everything is set to automatically detect the settings.
Check more details :XXXX