This may be a silly post, but you will find this useful when you want to restore your Ideapad U460 to Factory Default.
In IdeaPad U460, the OneKey Rescue/NOVO key (let me call it the 'U' turn key ) is actually a red button which is slightly depressed. Unlike other touch keys, you need a slightly sharper object to press this key (to activate the OneKey Rescue functionality).
I was merely touching the key earlier & was wondering why it did not work at all.
While I would give an A for Lenovo for making it accident-proof, I would give them a C for not documenting this properly in their manuals.