System Update Downloaded I have Nexus 7 (Android 4.4.4) and got message:


  System update downloaded 
  Android 5.0.2 System Update


But when I press on it, nothing happens.

How can I install this update?

UPDATE: About Tablet screenshot:
I had the same problem on my Nexus 7 (2012) on 4.4.4.

Do you have multiple user accounts on your tablet? If so, have you tried installing the update from the other account(s)?

I have two accounts, and when the 5.0.2 update got pushed to my device, both accounts got the notification. However, one of them had the same symptoms you described -- nothing happened when I pressed the notification, and the settings app didn't say anything about the update. From the other account, the update worked.

Strangely, the account that worked was not the one I created when I setup the tablet.