How to open a xslx file?

Opening an Excel 2007 document with Excel 2003.

Question:

Dave, who read my post on how to open a pptx file approached me with a similar question, this time on how to open a xslx file.

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How to open a pptx file?

Opening a Powerpoint 2007 file using Powerpoint 2003.

Question:

I just received a .pptx (Microsoft Office Power point 2007) file from a colleague here at work, but i don’t seem to be able to open it with Office 2003. Any clues on how i can open a pptx file with powerpoint 2003?
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How to password protect a PowerPoint 2007 presentation ?

Imagine for instance, that after working the entire day on an important presentation, you decide to save it on a network drive. On the next morning you discover that one of you colleagues had unintentionally modified your presentation Read more