Help Useless after Kitkat update

[Cullers]

Hi Everyone
I updated my Nexus 7 (2012) this morning. When it rebooted, it wouldn't go beyond the 'working' four circles logo. I followed some instructions and reinstalled the update. This time it seemed to work and got as far as the choice of keyboard language. I selected 'UK' and clicked next. This brought up the wifi network selection. I chose the home one and entered the password. It states there is a 'authentication problem'. I can't go anywhere from there. There is no other option. I can press the 'back' button and go back to the keyboard choice but nothing else is available. Plus, now I don't even have clockwork recovery. It just goes back to the normal android boot. Now my laptop doesn't even see the tablet. Its driving me mad!

 

[jhawkkw]

If you had cwm installed, that means that your bootloader should be unlocked. If you plug your device into the computer in fastboot mode, does it see it?

 

[Cullers]

Thanks for replying.
Nope. It never recognises it. I get a 'bong' when the N7 starts and ends but when I use Nexus Tools, it doesn't see it as being connected.

 

[jhawkkw]

If you open up the device manager (assuming you're using windows), do you see and android bootloader interface or some unknown android with the yellow triangle?