Authentication problemss

[AC Question]

When I try to connect my Lenovo tablet to the internet I have authentication problems. It was working up until yesterday and I have not had this problem before in the last 18 months. I have followed all the advice given as answers to the same problem, but nothing works

 

[ManiacJoe]

You need to describe in great detail the problems you are having.

 

[B. Diddy]

Welcome to Android Central! Does this only happen on your home wi-fi network, or on any wi-fi network? If it's only at home, try rebooting the router by unplugging its power for 10 seconds. If that doesn't help, see this guide for more ideas: http://forums.androidcentral.com/am...roubleshooting-wi-fi-connection-problems.html