On my Galaxy Tab 2 (7.0), I am suddenly unable to connect to Wifi I've googled this and turned up a bunch of inconclusive forum threads. I've also checked out a few similar questions on this site, but none of them quite match my details. So here they are:

I have a Galaxy Tab 2 (7.0) that's been working fine with my wifi router since I got it about 6 months ago. This morning when I fired it up, it rebooted and now I cannot connect to my wifi router. My wifi is not the issue as my Nexus 7 tablet is connected and working. 

This is what I see:


When I go to Settings > Wi-Fi, I see my network listed. But status is stuck on Obtaining IP address
After a while, status reports Network disabled. Poor connection


Tablet also reports that a "Software Update" is ready. Not sure if this is related to the issue. But when I try to update, I get a confirmation page and when I hit confirm button, I get message Unable to connect network.

I've tried the following:


Rebooting tablet
Forgetting and reconnecting to my network through Wi-Fi settings
Read this solution, but couldn't find Mobile Network Settings


Here's some system data from my tablet:

Model Number: GT-P3113
Android Version: 4.0.4
Kernel Version: 3.0.8-999349
Build Number: IMM76D.P3113UEBLH2


A simple solution would be appreciated. I'll post a solution if I figure it out myself. Thanks!
When in your WiFi settings, could you try pressing menu (or clicking the overflow dots), and selecting Settings.

Once done, untick the Avoid poor WiFi networks option, and see if it will now connect.

Also, restart the router.