System Information
Operating system and graphics card Windows 7

Blender Version 2.7
Broken: (example: 2.69.7 4b206af, see splash screen)
Worked: (optional)

Short description of error

The "bug" is for new users to have no obvious way to escape from undesirable results of "screen-split corner widget" experimentation. This advanced topic unfortunately appears near the front of books on Blender, but the related frustration is not what the beginner should encounter at this critical point in their tentative Blender career. Please add a "Get Back Home" icon near the top to restore the default windows, and/or add (x) icon to easily close unwanted duplicate windows. Thanks! Phil Barnes

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps