The best way to automate the use of your computer is to check if the computer has been turned on in these recent times, and how long it will take to shut it down, so that we can generally know if the computer has been used.
1
Check computer events to see when the computer has been opened
How to: Right-click the computer icon, choose Manage from the shortcut menu, open the Computer Management window, and select System tools → Event Viewer →windows log → system.
2
Select the event "EventLog", the computer boot event is determined by this, so just look at this on the line.
3
This event we can also generally see the computer start-up speed is how long, very good use of a function.
The above is about the Windows7 system how to view the computer boot history, this event is usually not noticed by others, so use the method to see others simply do not know to delete. It is easy to know that the computer has been started by WHO.