You can tell windows to clear it every time you logoff. You will need to fire up regedit and browse to this key
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
Add a dword value named ClearRecentDocsOnExit and set it to 1
Now every time you exit windows, your recent documents list will be cleared.
If you don't want to mess with the registry, we have created a program that will do it for you:
Download it from here - No spyware, or adware. Only freeware goodness.
Posted By: Steve Wiseman on Friday, December 15, 2006
Check out our utilities for windows