I bought O-2007 18 months ago with my desktop. I just purchased a laptop and thought I could install my 0-2007 in laptop. Can't do it. Must I buy another Office opack? I uninstalled the trial O-2010 that came with laptop thinking it was blocking installing my O-2007. Didn't work. Also, earlier, I re-installed O-2007 in my desktop because of virus attacks. Did this count as installation into three computers?