By default, Excel 2007 allows you to opens workbooks created in Excel 2003 in compatibility mode to preserve the integrity of older file versions. You can edit and save Excel 2003 files in Excel 2007.

The undo button will only get you so far—sometimes you just need to go back in time. It's called file versioning and here's how to use it.

How to Open Excel 2007 Files As Separate Windows. If you work with multiple Excel files over the course of a workday, and especially if you use a dual-monitor setup, you might wonder how you can ...

The 2007 versions of Word, Excel, PowerPoint, and Publisher list an option to remove personal information from file properties on save (this may be grayed out), as well as a Document Inspector ...

After that, make sure that the Open selected file types in Protected View option is selected. If so, tick all the Open checkboxes that are related to the old version of Excel. For example, you ...

Anyone using Office 2007 or Office 2010 is generating these kinds of files, which older versions of the Office applications can’t read.

Products affected include Office 2000, Office 2002, Office 2003, Office 2007, Office 2004 for Mac, Office 2008 for Mac, and the Open XML File Format Converter for Mac.