Try this 1
1)Right click on "Internet Explorer" icon --->click on "Properties" ---> Click on
"Connections" tab--> Click on LAN settings button. In that window uncheck all
the options, if you notice any option selected--->Click on OK---> Click on OK.
If the problem still exists, go to step 2.
2) Make sure that IP address and DNS server was set to obtain the address
Click on Start --> In search bar type ncpa.cpl and press "Enter".
Right click on your Network icon ---> Select "Properties" ---> scroll down
and double click on "Internet Protocol[TCP/IP]" . Make sure that
"Obtain IP address automatically" and "Obtain DNS server address automatically"
options are selected.
3) Click on Start --> In search bar type devmgmt.msc and press "Enter". Type this
ipconfig /all and press enter.
Make sure that IP Address, Subnet Mask, Default Gateway and DNS Servers
are having addresses.
4) Check your firewall.