Go to Start-Shutdown. When the dialog appears, hold CTRL+ALT+SHIFT and
press Cancel. Explorer will cleanly unload all of it's resources and
shutdown. To start it back up, open Task Manager (CTRL+SHIFT+ESC is one
way) and go to File-New Task and run 'explorer'.
Thanks to whomever sent me that! I found it in my archives, and thought it worthwhile to post here.