If you are feeling that somebody is physically accessing your computer & you don’t know at what time he/she is accessing your computer. Then friends here are the following steps to know the last shut down time of your computer:-
1. Go to start menu & write event viewer in search option & then hit enter.
If you are a Windows XP user, Go to Start> Run. Type eventvwr.msc and click OK button.
2. Event viewer window will open.
3. First click on “Window Logs” on the left side of the window & then click “System” on the right side of the window.
4. Now all the system files will open on the right side. Now scroll down the Source column & try to find out the EventLog with Event ID 6006 will show the correct time and date of last PC shutdown (In this case the time is 4/21/2010 12:26:57 PM).
So the last shut down time of my PC is 4/21/2010 12:26:57 PM.
That’s how you can easily find out when exactly was your computer last shut down.