Starts in my user's Documents folder if opened from Start Menu, Accessories, Windows Explorer. If you right-click the Start button and select Explore from the menu, then yes, it does open at Start Menu, because that's what you asked it to Explore. Select 'Computer' from the right-hand column of the Start Menu if you want to start at the top level. The only difference between this and an 'Explorer' view is now that the Folders pane is open by default when you select Explore.
"Multithreading is just one damn thing after, before, or simultaneous with another." - Andrei Alexandrescu