Nexus wont update to 4.2.2 stuck at the green droid

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http://forums.androidcentral.com – Hey I have been trying to update my Nexus and it just won't update and the stupid notification just annoys me so when the phone turns off and back on again it shows the green droid,androids logo, with a blue cube in the middle. The progress bar under it goes halfway then the droid dies with an exclamation mark on top!! It just pisses me off so much..meanwhile I was typing this the notif appeared two times. HELP! (HowTos)