Introduction to Document Inspector
Document Inspector allows you to quickly find and delete sensitive personal information. You can use Document Inspector to view what types of information is in your project and delete them easily by using the built-in modules or customize your own. Here are a few examples of information that you may wish to delete:
These kinds of information will put you at risk of potential identity fraud, credit fraud, and other illegal activities.
How to Use it in MS Powerpoint 2007
1. Click the Microsoft Office Button (Top Left Corner) then select Prepare and click on Inspect Document

Prepare Menu
2. You may be prompted to save your document. Save your document and the Document Inspector screen will be displayed.
3. Select the modules that correspond to the kind of information you want to look for and then click Inspect.
Once the Inspection is complete, Document Inspector dialog box will show the contents found by the modules in the document. There is also a remove button that allows you to remove the information.

Document Inspector Dialog Box After Inspection
4. After removing selected types of information, you may click Reinspect to remove other types of information or click Close to finish.

Document Inspector Dialog Box After Removing Information
Conclusion
You may visit Microsoft’s website:
http://msdn.microsoft.com/en-us/library/aa338203.aspx#office12_usingdocumentinspector_working
to find more information about using Document Inspector.