WiFi connected but all softwares cannot

Open Network and Sharing Center.
Click "Change Adapter Settings".
Find Network Connection that is used to connect to internet (either "Local Area Connection" or "Wireless Connection"), right-click on it and click Properties.
Now in new windows select "Internet Protocol 4 (TCP/IPv4)" and click Properties button.
In the new window click the checkbox for "Use the following DNS server addresses:"
Type in 8.8.8.8 and 8.8.4.4
Click Ok and close the rest of the windows.

Let us know what happens.