I got a Nexus 7 tablet a year ago or so, and when I got it, it was working perfectly fine for a few months. But then, I tried connecting it to WIFI and it didn't work. I just kept saying "Authentication Problem". I have a Belkin.c60 router for my tablet and I took my tablet into the same room as my router and tried to connect to WIFI, but it still didn't work. Does anyone know what I can do? 
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