So, there was an update for kitkat on my nexus 7, when I updated it half way through the process up updating it said "error", and there's no notification to update to kitkat, and if I go to the setting to check for an update it says "up to date" but its still 4.3, I have unlocked my boot loader and I'm rooted, btw its 32GB WiFi only 2012 nexus 7