Use the bar on the bottom of your screen to access it
Go down to About ChromeOS
It will either say up to date, need a restart, or will start updating.
Ctrl + C = Copy
Ctrl + D = Bookmark
Ctrl + F = Word Finder
Ctrl + H = History
Ctrl + O = Downloads
Ctrl + T = New Tab
Ctrl + V = Paste
Ctrl + X = Cut
Ctrl + Z = Delete
Ctrl + Shift + Box w/ 2 lines = Screen Shot