Isn't connecting to the Wifi

I have a Dell Venue 7 3741. Though it connects to the wifi, it isn't receiving internet signals. I get an error of No Internet. I think its some software problem, but I can't find the solution to it.. please help

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0