2007.0405 How to open Microsoft Office 2007 Product Box or Microsoft Vista Product Box
The product boxes for Microsoft Office 2007 and Microsoft Windows Vista are very difficult to open. It took me about half an hour to figure it out.

This series of photos describes how to open the plastic software boxes for Microsoft Office 2007 and Microsoft Vista.

The page at How to open your Windows Vista Box [hive.net] fails to mention the clear seal at the top of the box which must carefully be sliced with a knife or blade.

Other comments saying how hard the box is to open:
Announcing New Packaging for Windows Vista and 2007 Office System
23 photos · 48,289 views