A family of Microsoft word processing software products for creating web, email, and print documents.
Yes, you have made changes to the configuration of Word that have to be saved in the NORMAL.DOTM file. Change to defaults somewhere, and you have the Word Option "Prompt to save changes to normal" turned on.
If you remember what changes you made to configuration that you get to decide if you want to keep them or not. If you don't remember what the change could be, you reject it.
Sometimes 3rd party addons, that add buttons/tabs will trigger the change also.
So what is the question?
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http://office.microsoft.com/en-us/outlook-help/learn-where-menu-and-toolbar-commands-are-in-office-2010-HA101794130.aspx - Silverlight applets Mapping 2003 menu to 2010 ribbon for all Office apps.
http://office.microsoft.com/en-us/training/HA102295841033.aspx -Flash Applets mapping Office 2003 menus to 2007 ribbon.