I tried installing dell datasafe by using the link provided in the my dell application.  the link takes me to:

http://dslbchecker.datasafelocalbackup.com/dslchecker-en.html

where it says that dell datasafe local is compatible with Windows Vista.  However, the verification step says that it is only compatible with Windows 7.  I couldn't find anywhere on the website to report that issue.  I'm also interested in knowing whether the application is no longer available or if there is a different download location.