????!! Does this mean I can or can't? One computer at a time or just one ever? And who are "we"? "How are we feeling today?" We are feeling like Microsoft has too much of my $$ already.Under the Windows XP End-User License Agreement (EULA), we can install one licensed copy of Windows XP on one computer. As long as we follow this license agreement, Windows XP can be reinstalled and reactivated without any limitation. Please perform online activation.