Just called MS Support, they said OFFICE 2013 does not work with Vista so I tried to reinstall the same 2010 version I had on this machine but now I am getting another error:
Microsoft setup boots-trapper had stopped working
A problem caused the program to stop working corectly.
Windows will close the program and notify you if a solution is available.
searched the net and found others have this problem but no answer how to solve it as far as I can see>
Did you restart the Pc yet? Shut down, wait a minute then boot up.
Check the Control Panel > Programs And Features for Microsoft Office products and uninstall.
Actually, I have problems uninstalling in Vista but only Trial software.