On the lower right side of the start menu
is an icon of a lock. It says "lock this computer".

What is the purpose of this feature ?

Is it meant to keep people from walking up to an
unattended computer and gaining access to it ?
Or is is meant to keep sicko hackers from hacking
into your computer remotely while the computer is
left unattended ?

Either way it seems like a redundant feature
wouldn't just logging off do the same thing ?
Or I might be missing something altogether.

I searched windows help an looked on Google,
not much said about it. Please help me to understand
when this feature is for.

Thanks Mike