Delete Recent Documents in Office 2007

One time, I did a paper on the laptop ex-boyfriend. the problem is if I save a document by using the former name, can make a mad girlfriend right now,especially if the boyfriend is the last time to see the documents and any document with the name of your ex.
Other cases, you unlock some secret documents (eg on a laptop Good evening friends or cafe), after you're done, of course, secret documents that you open will be listed in the document or history, it means that everyone can have the appearance of a document or tracking that you have.
how to Delete Recent Documents in Office 2007 for example in Word, Excel or PowerPoint?
