The function
get-user-profile-directory
obtains the path to the current user's profile folder on a Windows NT-based system (including NT, Windows 2000 and Windows XP).
get-user-profile-directory
is implemented only on Windows.
result names the root of the profile directory.
Note that the default path for each user's profile may differ between versions of the operating system.
(sys:get-user-profile-directory)
=>
"C:\\WINNT\\Profiles\\fred"
(sys:get-user-profile-directory)
=>
nil