Office 2003 Activation Problem Can Someone Help Me With My Problems On Office 2003???

Can someone help me with my problems on Office 2003??? - office 2003 activation problem

I recently cleaned my computer, and I suppose it deletes some important information to my Office 2003 programs, so that now every time that says it has not been installed for the current user and closes. Can anyone help? Should I reinstall or ... What? I checked my task on the computer and other equipment, my license says I can be installed on up to three computers to use but not really to my third activation ... I avoid its use?