Can't install Microsoft office small bus. ed. 2003 on new computer

My computer quit last week, so bought a new one. My old computer had Windows
XP and my new one has Windows 7. My old computer had Works 8 on it and then
the Office Small Business Edition 2003 upgrade. Tried to install these two on
my new computer, Works installed ok but have had trouble with the Office. I
first thought it had to do with it being Windows 7, but from what I've read
that shouldn't be a problem. There was also a trial version of office 2007 on
my new computer and I thought that maybe was a problem. I had trouble
uninstalling that, but finally got it done. Now my Office still does not
work. I install it and click on it and get this message: Please wait while
Windows configures Microsoft Office Small Business Edition 2003. It keeps
doing this and does not open. It also does not ask for product key, so now
I'm wondering if it has something to do with activation?