Here's how to clear the list of recently used files in MS Office 2007 (Word, Excel, Powerpoint).
Go to the Office Button, choose the Word/Excel/Powerpoint options button in the lower right hand corner.
In that dialog box go to "Advanced". Scroll down to "Display" and where it says "Show this number of recent documents" set the number to 0 then hit OK.
Your list will be clear.
Recent comments
13 weeks 6 days ago
14 weeks 3 hours ago
17 weeks 3 days ago
25 weeks 9 hours ago
25 weeks 13 hours ago
25 weeks 13 hours ago
25 weeks 1 day ago
25 weeks 1 day ago
25 weeks 1 day ago
25 weeks 2 days ago