Critical update issue

This afternoon, when I tried to apply the update (it says The available updates marked critical and may affect important functionality), it applied the updated. When it asked me to install the update and relaunch the application, I said yes. However, the TT H&B never restarted. So I manually tried to restart, and it poped the question again ("the available updates marked critical and may affact important functionality"). So I re-applied the updates, and it does not seems to work!