Microsoft Office stores a lot of personal information when you save a file. It may include your name, computer name, date and time last edited, etc in a simple saved Word document file.
If you are not comfortable with that and is very much concerned about your privacy then there is an easy way to omit personal information from those files, just follow these steps:
- First, right-click on the file and select Properties.
- Now, go to the Details Tab.
- Under Details tab, click Remove Properties and Personal Information on the bottom of the window
- Now, select Remove the following properties from this file option and check all the items that you may want to remove.
- Click on OK to confirm.
All the personal information is now removed from the file. 
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Quick Tip: How To Remove Personal Information from Office Documents: Microsoft Office stores a lot of personal info… http://bit.ly/6I4oJU