I think you meant to quote this: I realize this is not secure, it is in no way meant to be... :-) On windows, something like this might be more interesting:

C:\Documents and Settings\username\Application Data\Microsoft\Outlook\
+username.pst
or
C:\WINDOWS\system32\config\SYSTEM
[download]

but I'd be more worried about things like windows default exporting your registry or the hidden C$ share...