Want to know the last Shut Down time? here we go..
In XP type eventvwr.msc in the Run dialog box-Please for God sake don’t ask me how to open Run dialog box.
And if you use Vista or Windows7 then type the “Event Viewer” in the Start Search Box.
Now click on the System tab in the left panel.
Now look for the first occurrence of event with event id 6006. This will give us what we are searching for.