Why does Lion open everything each time I start my MacBook?

Question

Every time I turn on my MacBook, Lion opens my calendar, email, my virtual computer, etc.  Each time I shutdown, I uncheck "Reopen windows when logging back in".  The next time I startup, all is well, but then the next time I shutdown, the "Reopen windows...." boxed is checked again.  I never want my windows (especially my virtual computer) to open automatically.  I'll open them when I need them.  Why do I have to remember to uncheck the box each and every time I shut down?  Isn't there a way to answer this once and leave it that way?

Answer 1

One more thing:
Go to (User) ~/Library/Saved Application State Folder
(user library is now hidden; to unhide, hold Option key and go to Go menu > Library will now be visible)
Select all content in that folder and move to Trash.
Right click (or Command + I) to "Get Info" window.
Unlock lock > input your admin password
Click the Locked option here:
Lock lock at bottom of window.
Doing this will lock the folder so nothing can be written to it. There haven't been any entries and I haven't noticed the Resume feature since I did that (although I still uncheck the box in the shutdown dialog....that, unfortunately, is still present).