[maarescal]

my htc one m8 all of sudden cant connect to my homes wifi, my laptop and other phones in the house are connect but everytime i put "forget network" and then re-type the correct password multiple times it "authentication problem"

[Mooncatt]

Try rebooting the router. This happens to me on occasion, with several different phones, and rebooting the router is the only thing that fixes it.

[B. Diddy]

Agree with Mooncatt. Review this guide as well: http://forums.androidcentral.com/amb...-problems.html